Who is the fastest? Node.js, Bun.js, or Deno.js

Speed isn’t the only factor that makes a JavaScript runtime great, but it’s a good place to start.

A runtime is essentially the environment that executes your code, handling things like memory management, i/o operations, and more.

A runtime is the engine under the hood of your JavaScript applications.

Runtime	Engine	Engine Language (Built in)	Runtime Language (Built In)	First Release
Node.js	V8	C++	C++	2009
Deno	V8	C++	Rust	2020
Bun	JavaScriptCore	C++	Zig	2022

The terms “engine” and “runtime” refer to different components that work together to execute JavaScript code.

Engine

The engine is the core component that interprets or compiles JavaScript code into machine code that the computer can execute. It is responsible for understanding and executing the JavaScript syntax and features.

Engines are designed to optimize code execution and manage memory efficiently.

V8: An open-source JavaScript engine developed by Google, written in C++. It’s used in both Node.js and Deno, as well as in Google Chrome.
JavaScriptCore: Also known as “JSC,” this is the engine developed by Apple, written in C++, and used in Bun and Safari.

Runtime

The runtime is the environment that provides additional functionality beyond what the engine offers. That includes APIs and libraries that enable interactions with the operating system, manage i/o operations, handle asynchronous tasks, and more.

The runtime essentially wraps around the engine and extends its capabilities.

Node.js: Built in C++ and JavaScript, it provides a rich set of APIs for server-side development, such as file system access, HTTP servers, and more.
Deno.js: Developed in Rust, Deno offers secure-by-default features, native TypeScript support, and a standard library.
Bun.js: Written in Zig, Bun focuses on performance and includes a fast JavaScript/TypeScript runtime and bundler.

How They Work Together

Engine + Runtime: The engine parses and executes the JavaScript code, while the runtime provides the necessary environment and tools for the code to interact with the system and perform useful tasks.

For example, in Node.js, the V8 engine handles the JavaScript execution, while the Node.js runtime provides modules like fs (for file system operations) and http (for building servers).

Similarly, in Deno, the V8 engine runs the JavaScript, and the Deno runtime offers features like permissions and a standard library for common tasks.

Bun uses JavaScriptCore for execution and its runtime for high-performance utilities.

In a nutshell, the engine is the core JavaScript interpreter or compiler. The runtime is the broader environment that includes tools, libraries, and APIs for building and running applications.

Both are essential for the complete execution of JavaScript code in different contexts.

Importance of Speed in JavaScript Runtimes

User Experience: Faster response times result in a better user experience. Applications that run quickly are seen as more responsive and reliable. This can increase user satisfaction and retention.
Scalability: Higher speed often correlates with lower resource usage. This efficiency enables servers to handle more concurrent users or requests, enhancing scalability and cost-effectiveness, particularly for high-traffic applications.
Developer Productivity: Faster runtimes shorten development time by speeding up testing and debugging phases. Quicker feedback loops enhance the developer experience and accelerate the development process.
Cost Efficiency: Efficient resource utilization lowers operational costs. By reducing CPU and memory usage, you can achieve significant savings, especially as your application scales.

Benchmarking Runtimes Using AutoCannon

AutoCannon is an HTTP/1.1 benchmarking tool. It excels at assessing the performance of HTTP/1.1 servers by focusing on key metrics like raw throughput and latency.

I simulated 100 concurrent connections for 30 seconds. I measured how well each runtime handles requests and data under heavy load.

Hardware Overview

1
Hardware:
2
      Model Name: MacBook Pro (2023)
3
      Model Identifier: Mac15,7
4
      Chip: Apple M3 Pro
5
      Total Number of Cores: 12 (6 performance and 6 efficiency)
6
      Memory: 36 GB
7
      System Firmware Version: 10151.140.19
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      OS Loader Version: 10151.140.19
9
      macOS (Sonoma): 14.6 (23G80)

Key Metrics

Requests per Second (Req/Sec): Indicates the number of HTTP requests the server can handle per second. A higher value means better handling of concurrent traffic.
Average Latency: Measures the time taken for a request to travel to the server and back. Lower latency means faster response times.
Throughput: Represents the amount of data transferred between the server and clients per second. Higher throughput indicates the server’s efficiency in handling data.

Understanding the Metrics (example)

The table below provides a snapshot of the key performance metrics observed during our benchmarking tests. Each metric helps illustrate how well the servers perform under load, offering insights into their responsiveness and capacity.

Metric	2.5%	50%	97.5%	99%	Avg	Stdev	Max
Latency (ms)	0	0	1	1	0.1	0.34	19
Req/Sec	100,479	100,479	106,367	108,607	106,182.4	1,948.84	100,454
Bytes/Sec (MB)	18.5	18.5	19.6	20	19.5	357	18.5

Breakdown of Metrics

Percentiles (2.5%, 50%, 97.5%, 99%): These values show the latency experienced by the top percentages of requests. For example, the 2.5% value means 2.5% of the requests had a latency equal to or lower than that number, highlighting the best response times. The 50% (median) indicates the typical latency, while 97.5% and 99% values show the upper range of latencies, reflecting slower responses under load.
Avg (Average): This represents the mean value of all data points, such as latency or request rate. It provides a general sense of the runtime’s performance, showing how quickly the server responds on average.
Stdev (Standard Deviation): This metric measures the variability in the data points. A low standard deviation suggests consistent performance, while a high standard deviation indicates more variability and potential instability.
Max: The maximum observed value, representing the worst-case scenario. It shows the highest latency or the most substantial deviation from the average performance, crucial for understanding the extremes of system performance.

These metrics provide a clear picture of each server’s efficiency in handling concurrent requests and data. They allow us to assess the stability, speed, and overall reliability of the runtimes.

Node.js (v22.5.1)

1
➜  benchmark node -v
2
v22.5.1
3
➜  benchmark npm run bench:autocannon:node
4

5
> [email protected] bench:autocannon:node
6
> autocannon -c 100 -d 30 http://localhost:3000
7

8
Running 30s test @ http://localhost:3000
9
100 connections
10

11

12
┌─────────┬──────┬──────┬───────┬──────┬────────┬─────────┬───────┐
13
│ Stat    │ 2.5% │ 50%  │ 97.5% │ 99%  │ Avg    │ Stdev   │ Max   │
14
├─────────┼──────┼──────┼───────┼──────┼────────┼─────────┼───────┤
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│ Latency │ 0 ms │ 0 ms │ 1 ms  │ 1 ms │ 0.1 ms │ 0.34 ms │ 19 ms │
16
└─────────┴──────┴──────┴───────┴──────┴────────┴─────────┴───────┘
17
┌───────────┬─────────┬─────────┬─────────┬─────────┬───────────┬──────────┬─────────┐
18
│ Stat      │ 1%      │ 2.5%    │ 50%     │ 97.5%   │ Avg       │ Stdev    │ Min     │
19
├───────────┼─────────┼─────────┼─────────┼─────────┼───────────┼──────────┼─────────┤
20
│ Req/Sec   │ 100,479 │ 100,479 │ 106,367 │ 108,607 │ 106,182.4 │ 1,948.84 │ 100,454 │
21
├───────────┼─────────┼─────────┼─────────┼─────────┼───────────┼──────────┼─────────┤
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│ Bytes/Sec │ 18.5 MB │ 18.5 MB │ 19.6 MB │ 20 MB   │ 19.5 MB   │ 357 kB   │ 18.5 MB │
23
└───────────┴─────────┴─────────┴─────────┴─────────┴───────────┴──────────┴─────────┘
24

25
Req/Bytes counts sampled once per second.
26
# of samples: 30
27

28
3186k requests in 30.01s, 586 MB read

Metric	2.5%	50%	97.5%	99%	Avg	Stdev	Max
Latency (ms)	0	0	1	1	0.1	0.34	19
Req/Sec	100,479	100,479	106,367	108,607	106,182.4	1,948.84	100,454
Bytes/Sec (MB)	18.5	18.5	19.6	20	19.5	357	18.5

Node.js handled an average of 106,182.4 requests per second with an average latency of 0.1 ms. The maximum latency reached was 19 ms, indicating some variability under load but generally low. The throughput was 586 MB.

Bun.js (v1.1.21)

1
➜  benchmark bun -v
2
1.1.21
3
➜  benchmark npm run bench:autocannon:bun
4

5
> [email protected] bench:autocannon:bun
6
> autocannon -c 100 -d 30 http://localhost:3001
7

8
Running 30s test @ http://localhost:3001
9
100 connections
10

11

12
┌─────────┬──────┬──────┬───────┬──────┬─────────┬─────────┬───────┐
13
│ Stat    │ 2.5% │ 50%  │ 97.5% │ 99%  │ Avg     │ Stdev   │ Max   │
14
├─────────┼──────┼──────┼───────┼──────┼─────────┼─────────┼───────┤
15
│ Latency │ 0 ms │ 0 ms │ 0 ms  │ 1 ms │ 0.02 ms │ 0.16 ms │ 16 ms │
16
└─────────┴──────┴──────┴───────┴──────┴─────────┴─────────┴───────┘
17
┌───────────┬─────────┬─────────┬─────────┬─────────┬────────────┬──────────┬─────────┐
18
│ Stat      │ 1%      │ 2.5%    │ 50%     │ 97.5%   │ Avg        │ Stdev    │ Min     │
19
├───────────┼─────────┼─────────┼─────────┼─────────┼────────────┼──────────┼─────────┤
20
│ Req/Sec   │ 128,639 │ 128,639 │ 132,095 │ 135,423 │ 132,417.07 │ 1,567.99 │ 128,591 │
21
├───────────┼─────────┼─────────┼─────────┼─────────┼────────────┼──────────┼─────────┤
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│ Bytes/Sec │ 16.5 MB │ 16.5 MB │ 16.9 MB │ 17.3 MB │ 16.9 MB    │ 201 kB   │ 16.5 MB │
23
└───────────┴─────────┴─────────┴─────────┴─────────┴────────────┴──────────┴─────────┘
24

25
Req/Bytes counts sampled once per second.
26
# of samples: 30
27

28
3973k requests in 30.01s, 508 MB read

Metric	2.5%	50%	97.5%	99%	Avg	Stdev	Max
Latency (ms)	0	0	0	1	0.02	0.16	16
Req/Sec	128,639	128,639	132,095	135,423	132,417.07	1,567.99	128,591
Bytes/Sec (MB)	16.5	16.5	16.9	17.3	16.9	201	16.5

Bun.js showed 132,417.07 requests per second with an impressive average latency of just 0.02 ms. The maximum latency observed was 16 ms. Bun.js also had a throughput of 508 MB, slightly lower than Node.js.

Deno (v1.45.5)

1
➜  benchmark deno --version
2
deno 1.45.5 (release, aarch64-apple-darwin)
3
v8 12.7.224.13
4
typescript 5.5.2
5
➜  benchmark npm run bench:autocannon:deno
6

7
> [email protected] bench:autocannon:deno
8
> autocannon -c 100 -d 30 http://localhost:8000
9

10
Running 30s test @ http://localhost:8000
11
100 connections
12

13

14
┌─────────┬──────┬──────┬───────┬──────┬─────────┬─────────┬───────┐
15
│ Stat    │ 2.5% │ 50%  │ 97.5% │ 99%  │ Avg     │ Stdev   │ Max   │
16
├─────────┼──────┼──────┼───────┼──────┼─────────┼─────────┼───────┤
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│ Latency │ 0 ms │ 0 ms │ 1 ms  │ 1 ms │ 0.04 ms │ 0.23 ms │ 20 ms │
18
└─────────┴──────┴──────┴───────┴──────┴─────────┴─────────┴───────┘
19
┌───────────┬─────────┬─────────┬─────────┬─────────┬────────────┬──────────┬─────────┐
20
│ Stat      │ 1%      │ 2.5%    │ 50%     │ 97.5%   │ Avg        │ Stdev    │ Min     │
21
├───────────┼─────────┼─────────┼─────────┼─────────┼────────────┼──────────┼─────────┤
22
│ Req/Sec   │ 141,439 │ 141,439 │ 148,991 │ 149,887 │ 148,309.34 │ 1,748.84 │ 141,387 │
23
├───────────┼─────────┼─────────┼─────────┼─────────┼────────────┼──────────┼─────────┤
24
│ Bytes/Sec │ 21.8 MB │ 21.8 MB │ 23 MB   │ 23.1 MB │ 22.8 MB    │ 271 kB   │ 21.8 MB │
25
└───────────┴─────────┴─────────┴─────────┴─────────┴────────────┴──────────┴─────────┘
26

27
Req/Bytes counts sampled once per second.
28
# of samples: 30
29

30
4449k requests in 30.01s, 685 MB read

Metric	2.5%	50%	97.5%	99%	Avg	Stdev	Max
Latency (ms)	0	0	1	1	0.04	0.23	20
Req/Sec	141,439	141,439	148,991	149,887	148,309.34	1,748.84	141,387
Bytes/Sec (MB)	21.8	21.8	23	23.1	22.8	271	21.8

Deno led the pack with 148,309.34 requests per second and an average latency of 0.04 ms. The maximum latency reached 20 ms, showing good consistency. Deno achieved the highest throughput among the three, at 685 MB.

Results

Latency: Lower latency means faster response times. Bun.js and Deno had lower average latencies compared to Node.js, making them more responsive under the same load.

Requests per Second: This metric indicates how many requests the server can handle per second. Deno outperformed both Node.js and Bun.js, making it the most capable in handling large numbers of concurrent requests.

Throughput: Throughput measures the amount of data processed per second. Deno also excelled here, handling the highest amount of data.

Conclusion

Deno stood out as the fastest among the three, followed by Bun.js, with Node.js coming in third.

Benchmarking Runtimes Using Artillery

Artillery is designed for sophisticated load testing, including testing APIs, microservices, and websites. It’s used for simulating complex, real-world scenarios with multiple stages and user interactions.

Node.js

1
➜  benchmark node -v
2
v22.5.1
3
➜  benchmark npm run bench:artillery:node
4

5
> [email protected] bench:artillery:node
6
> artillery run artillery.yaml
7

8
Test run id: tnkrx_az9b76npmdxe6byqfzm48bepakc7d_h7p6
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Phase started: unnamed (index: 0, duration: 60s) 20:15:29(+0300)
10

11
--------------------------------------
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Metrics for period to: 20:15:30(+0300) (width: 0.521s)
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--------------------------------------
14

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http.codes.200: ................................................................ 57
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http.downloaded_bytes: ......................................................... 912
17
http.request_rate: ............................................................. 57/sec
18
http.requests: ................................................................. 57
19
http.response_time:
20
  min: ......................................................................... 0
21
  max: ......................................................................... 1
22
  mean: ........................................................................ 0.2
23
  median: ...................................................................... 0
24
  p95: ......................................................................... 1
25
  p99: ......................................................................... 1
26
http.responses: ................................................................ 57
27
vusers.completed: .............................................................. 19
28
vusers.created: ................................................................ 19
29
vusers.created_by_name.0: ...................................................... 19
30
vusers.failed: ................................................................. 0
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vusers.session_length:
32
  min: ......................................................................... 2.9
33
  max: ......................................................................... 17.6
34
  mean: ........................................................................ 8.5
35
  median: ...................................................................... 11.8
36
  p95: ......................................................................... 13.3
37
  p99: ......................................................................... 13.3
38

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--------------------------------------
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Metrics for period to: 20:15:40(+0300) (width: 9.957s)
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--------------------------------------
43

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http.codes.200: ................................................................ 1500
45
http.downloaded_bytes: ......................................................... 24000
46
http.request_rate: ............................................................. 150/sec
47
http.requests: ................................................................. 1500
48
http.response_time:
49
  min: ......................................................................... 0
50
  max: ......................................................................... 1
51
  mean: ........................................................................ 0.1
52
  median: ...................................................................... 0
53
  p95: ......................................................................... 1
54
  p99: ......................................................................... 1
55
http.responses: ................................................................ 1500
56
vusers.completed: .............................................................. 500
57
vusers.created: ................................................................ 500
58
vusers.created_by_name.0: ...................................................... 500
59
vusers.failed: ................................................................. 0
60
vusers.session_length:
61
  min: ......................................................................... 1.3
62
  max: ......................................................................... 12
63
  mean: ........................................................................ 2.1
64
  median: ...................................................................... 2
65
  p95: ......................................................................... 2.7
66
  p99: ......................................................................... 4.3
67

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Metrics for period to: 20:15:50(+0300) (width: 9.958s)
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http.codes.200: ................................................................ 1500
74
http.downloaded_bytes: ......................................................... 24000
75
http.request_rate: ............................................................. 150/sec
76
http.requests: ................................................................. 1500
77
http.response_time:
78
  min: ......................................................................... 0
79
  max: ......................................................................... 1
80
  mean: ........................................................................ 0.1
81
  median: ...................................................................... 0
82
  p95: ......................................................................... 1
83
  p99: ......................................................................... 1
84
http.responses: ................................................................ 1500
85
vusers.completed: .............................................................. 500
86
vusers.created: ................................................................ 500
87
vusers.created_by_name.0: ...................................................... 500
88
vusers.failed: ................................................................. 0
89
vusers.session_length:
90
  min: ......................................................................... 1.2
91
  max: ......................................................................... 4.8
92
  mean: ........................................................................ 1.8
93
  median: ...................................................................... 1.8
94
  p95: ......................................................................... 2.1
95
  p99: ......................................................................... 2.5
96

97

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--------------------------------------
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Metrics for period to: 20:16:00(+0300) (width: 9.957s)
100
--------------------------------------
101

102
http.codes.200: ................................................................ 1500
103
http.downloaded_bytes: ......................................................... 24000
104
http.request_rate: ............................................................. 150/sec
105
http.requests: ................................................................. 1500
106
http.response_time:
107
  min: ......................................................................... 0
108
  max: ......................................................................... 1
109
  mean: ........................................................................ 0.1
110
  median: ...................................................................... 0
111
  p95: ......................................................................... 1
112
  p99: ......................................................................... 1
113
http.responses: ................................................................ 1500
114
vusers.completed: .............................................................. 500
115
vusers.created: ................................................................ 500
116
vusers.created_by_name.0: ...................................................... 500
117
vusers.failed: ................................................................. 0
118
vusers.session_length:
119
  min: ......................................................................... 1.2
120
  max: ......................................................................... 4.9
121
  mean: ........................................................................ 1.7
122
  median: ...................................................................... 1.7
123
  p95: ......................................................................... 2
124
  p99: ......................................................................... 2.3
125

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Metrics for period to: 20:16:10(+0300) (width: 9.957s)
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131
http.codes.200: ................................................................ 1500
132
http.downloaded_bytes: ......................................................... 24000
133
http.request_rate: ............................................................. 150/sec
134
http.requests: ................................................................. 1500
135
http.response_time:
136
  min: ......................................................................... 0
137
  max: ......................................................................... 1
138
  mean: ........................................................................ 0.1
139
  median: ...................................................................... 0
140
  p95: ......................................................................... 1
141
  p99: ......................................................................... 1
142
http.responses: ................................................................ 1500
143
vusers.completed: .............................................................. 500
144
vusers.created: ................................................................ 500
145
vusers.created_by_name.0: ...................................................... 500
146
vusers.failed: ................................................................. 0
147
vusers.session_length:
148
  min: ......................................................................... 1.2
149
  max: ......................................................................... 3.7
150
  mean: ........................................................................ 1.7
151
  median: ...................................................................... 1.6
152
  p95: ......................................................................... 2.1
153
  p99: ......................................................................... 2.6
154

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157
Metrics for period to: 20:16:20(+0300) (width: 9.957s)
158
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160
http.codes.200: ................................................................ 1500
161
http.downloaded_bytes: ......................................................... 24000
162
http.request_rate: ............................................................. 150/sec
163
http.requests: ................................................................. 1500
164
http.response_time:
165
  min: ......................................................................... 0
166
  max: ......................................................................... 15
167
  mean: ........................................................................ 0.1
168
  median: ...................................................................... 0
169
  p95: ......................................................................... 1
170
  p99: ......................................................................... 1
171
http.responses: ................................................................ 1500
172
vusers.completed: .............................................................. 500
173
vusers.created: ................................................................ 500
174
vusers.created_by_name.0: ...................................................... 500
175
vusers.failed: ................................................................. 0
176
vusers.session_length:
177
  min: ......................................................................... 1.2
178
  max: ......................................................................... 15.7
179
  mean: ........................................................................ 1.7
180
  median: ...................................................................... 1.6
181
  p95: ......................................................................... 2
182
  p99: ......................................................................... 5.6
183

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185
Phase completed: unnamed (index: 0, duration: 60s) 20:16:29(+0300)
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Metrics for period to: 20:16:30(+0300) (width: 9.759s)
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http.codes.200: ................................................................ 1443
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http.downloaded_bytes: ......................................................... 23088
193
http.request_rate: ............................................................. 150/sec
194
http.requests: ................................................................. 1443
195
http.response_time:
196
  min: ......................................................................... 0
197
  max: ......................................................................... 1
198
  mean: ........................................................................ 0.1
199
  median: ...................................................................... 0
200
  p95: ......................................................................... 1
201
  p99: ......................................................................... 1
202
http.responses: ................................................................ 1443
203
vusers.completed: .............................................................. 481
204
vusers.created: ................................................................ 481
205
vusers.created_by_name.0: ...................................................... 481
206
vusers.failed: ................................................................. 0
207
vusers.session_length:
208
  min: ......................................................................... 1.1
209
  max: ......................................................................... 8.2
210
  mean: ........................................................................ 1.6
211
  median: ...................................................................... 1.6
212
  p95: ......................................................................... 1.9
213
  p99: ......................................................................... 2.9
214

215

216
All VUs finished. Total time: 1 minute, 3 seconds
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--------------------------------
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Summary report @ 20:16:32(+0300)
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--------------------------------
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http.codes.200: ................................................................ 9000
223
http.downloaded_bytes: ......................................................... 144000
224
http.request_rate: ............................................................. 140/sec
225
http.requests: ................................................................. 9000
226
http.response_time:
227
  min: ......................................................................... 0
228
  max: ......................................................................... 15
229
  mean: ........................................................................ 0.1
230
  median: ...................................................................... 0
231
  p95: ......................................................................... 1
232
  p99: ......................................................................... 1
233
http.responses: ................................................................ 9000
234
vusers.completed: .............................................................. 3000
235
vusers.created: ................................................................ 3000
236
vusers.created_by_name.0: ...................................................... 3000
237
vusers.failed: ................................................................. 0
238
vusers.session_length:
239
  min: ......................................................................... 1.1
240
  max: ......................................................................... 17.6
241
  mean: ........................................................................ 1.8
242
  median: ...................................................................... 1.7
243
  p95: ......................................................................... 2.3
244
  p99: ......................................................................... 4.4

Deno.js

1
➜  benchmark deno --version
2
deno 1.45.5 (release, aarch64-apple-darwin)
3
v8 12.7.224.13
4
typescript 5.5.2
5
➜  benchmark npm run bench:artillery:deno
6

7
> [email protected] bench:artillery:deno
8
> artillery run artillery.yaml
9

10
Test run id: tcge5_ycwyfxjqxr67qbz353wmw8qyxkmpr_tgwh
11
Phase started: unnamed (index: 0, duration: 60s) 20:41:23(+0300)
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Metrics for period to: 20:41:30(+0300) (width: 6.606s)
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--------------------------------------
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http.codes.200: ................................................................ 972
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http.downloaded_bytes: ......................................................... 14580
19
http.request_rate: ............................................................. 154/sec
20
http.requests: ................................................................. 972
21
http.response_time:
22
  min: ......................................................................... 0
23
  max: ......................................................................... 1
24
  mean: ........................................................................ 0.1
25
  median: ...................................................................... 0
26
  p95: ......................................................................... 1
27
  p99: ......................................................................... 1
28
http.responses: ................................................................ 972
29
vusers.completed: .............................................................. 324
30
vusers.created: ................................................................ 324
31
vusers.created_by_name.0: ...................................................... 324
32
vusers.failed: ................................................................. 0
33
vusers.session_length:
34
  min: ......................................................................... 1.5
35
  max: ......................................................................... 20.4
36
  mean: ........................................................................ 2.5
37
  median: ...................................................................... 2
38
  p95: ......................................................................... 4.4
39
  p99: ......................................................................... 13.1
40

41

42
--------------------------------------
43
Metrics for period to: 20:41:40(+0300) (width: 9.957s)
44
--------------------------------------
45

46
http.codes.200: ................................................................ 1500
47
http.downloaded_bytes: ......................................................... 22500
48
http.request_rate: ............................................................. 150/sec
49
http.requests: ................................................................. 1500
50
http.response_time:
51
  min: ......................................................................... 0
52
  max: ......................................................................... 2
53
  mean: ........................................................................ 0.1
54
  median: ...................................................................... 0
55
  p95: ......................................................................... 1
56
  p99: ......................................................................... 1
57
http.responses: ................................................................ 1500
58
vusers.completed: .............................................................. 500
59
vusers.created: ................................................................ 500
60
vusers.created_by_name.0: ...................................................... 500
61
vusers.failed: ................................................................. 0
62
vusers.session_length:
63
  min: ......................................................................... 1.3
64
  max: ......................................................................... 14.7
65
  mean: ........................................................................ 2
66
  median: ...................................................................... 1.9
67
  p95: ......................................................................... 2.7
68
  p99: ......................................................................... 4.7
69

70

71
--------------------------------------
72
Metrics for period to: 20:41:50(+0300) (width: 9.956s)
73
--------------------------------------
74

75
http.codes.200: ................................................................ 1500
76
http.downloaded_bytes: ......................................................... 22500
77
http.request_rate: ............................................................. 150/sec
78
http.requests: ................................................................. 1500
79
http.response_time:
80
  min: ......................................................................... 0
81
  max: ......................................................................... 2
82
  mean: ........................................................................ 0.1
83
  median: ...................................................................... 0
84
  p95: ......................................................................... 1
85
  p99: ......................................................................... 1
86
http.responses: ................................................................ 1500
87
vusers.completed: .............................................................. 500
88
vusers.created: ................................................................ 500
89
vusers.created_by_name.0: ...................................................... 500
90
vusers.failed: ................................................................. 0
91
vusers.session_length:
92
  min: ......................................................................... 1.3
93
  max: ......................................................................... 3.6
94
  mean: ........................................................................ 1.9
95
  median: ...................................................................... 1.8
96
  p95: ......................................................................... 2.3
97
  p99: ......................................................................... 2.9
98

99

100
--------------------------------------
101
Metrics for period to: 20:42:00(+0300) (width: 9.958s)
102
--------------------------------------
103

104
http.codes.200: ................................................................ 1500
105
http.downloaded_bytes: ......................................................... 22500
106
http.request_rate: ............................................................. 150/sec
107
http.requests: ................................................................. 1500
108
http.response_time:
109
  min: ......................................................................... 0
110
  max: ......................................................................... 7
111
  mean: ........................................................................ 0.1
112
  median: ...................................................................... 0
113
  p95: ......................................................................... 1
114
  p99: ......................................................................... 1
115
http.responses: ................................................................ 1500
116
vusers.completed: .............................................................. 500
117
vusers.created: ................................................................ 500
118
vusers.created_by_name.0: ...................................................... 500
119
vusers.failed: ................................................................. 0
120
vusers.session_length:
121
  min: ......................................................................... 1.3
122
  max: ......................................................................... 19.3
123
  mean: ........................................................................ 1.8
124
  median: ...................................................................... 1.7
125
  p95: ......................................................................... 2.2
126
  p99: ......................................................................... 3.2
127

128

129
--------------------------------------
130
Metrics for period to: 20:42:10(+0300) (width: 9.957s)
131
--------------------------------------
132

133
http.codes.200: ................................................................ 1500
134
http.downloaded_bytes: ......................................................... 22500
135
http.request_rate: ............................................................. 150/sec
136
http.requests: ................................................................. 1500
137
http.response_time:
138
  min: ......................................................................... 0
139
  max: ......................................................................... 8
140
  mean: ........................................................................ 0.1
141
  median: ...................................................................... 0
142
  p95: ......................................................................... 1
143
  p99: ......................................................................... 1
144
http.responses: ................................................................ 1500
145
vusers.completed: .............................................................. 500
146
vusers.created: ................................................................ 500
147
vusers.created_by_name.0: ...................................................... 500
148
vusers.failed: ................................................................. 0
149
vusers.session_length:
150
  min: ......................................................................... 1.2
151
  max: ......................................................................... 10.5
152
  mean: ........................................................................ 1.8
153
  median: ...................................................................... 1.7
154
  p95: ......................................................................... 2.1
155
  p99: ......................................................................... 4.4
156

157

158
Phase completed: unnamed (index: 0, duration: 60s) 20:42:23(+0300)
159

160
--------------------------------------
161
Metrics for period to: 20:42:20(+0300) (width: 9.956s)
162
--------------------------------------
163

164
http.codes.200: ................................................................ 1500
165
http.downloaded_bytes: ......................................................... 22500
166
http.request_rate: ............................................................. 150/sec
167
http.requests: ................................................................. 1500
168
http.response_time:
169
  min: ......................................................................... 0
170
  max: ......................................................................... 9
171
  mean: ........................................................................ 0.1
172
  median: ...................................................................... 0
173
  p95: ......................................................................... 1
174
  p99: ......................................................................... 1
175
http.responses: ................................................................ 1500
176
vusers.completed: .............................................................. 500
177
vusers.created: ................................................................ 500
178
vusers.created_by_name.0: ...................................................... 500
179
vusers.failed: ................................................................. 0
180
vusers.session_length:
181
  min: ......................................................................... 1.1
182
  max: ......................................................................... 11.3
183
  mean: ........................................................................ 1.7
184
  median: ...................................................................... 1.6
185
  p95: ......................................................................... 1.9
186
  p99: ......................................................................... 2.3
187

188

189
--------------------------------------
190
Metrics for period to: 20:42:30(+0300) (width: 3.66s)
191
--------------------------------------
192

193
http.codes.200: ................................................................ 528
194
http.downloaded_bytes: ......................................................... 7920
195
http.request_rate: ............................................................. 161/sec
196
http.requests: ................................................................. 528
197
http.response_time:
198
  min: ......................................................................... 0
199
  max: ......................................................................... 1
200
  mean: ........................................................................ 0.1
201
  median: ...................................................................... 0
202
  p95: ......................................................................... 1
203
  p99: ......................................................................... 1
204
http.responses: ................................................................ 528
205
vusers.completed: .............................................................. 176
206
vusers.created: ................................................................ 176
207
vusers.created_by_name.0: ...................................................... 176
208
vusers.failed: ................................................................. 0
209
vusers.session_length:
210
  min: ......................................................................... 1.2
211
  max: ......................................................................... 2.3
212
  mean: ........................................................................ 1.6
213
  median: ...................................................................... 1.6
214
  p95: ......................................................................... 2.1
215
  p99: ......................................................................... 2.2
216

217

218
All VUs finished. Total time: 1 minute, 3 seconds
219

220
--------------------------------
221
Summary report @ 20:42:26(+0300)
222
--------------------------------
223

224
http.codes.200: ................................................................ 9000
225
http.downloaded_bytes: ......................................................... 135000
226
http.request_rate: ............................................................. 150/sec
227
http.requests: ................................................................. 9000
228
http.response_time:
229
  min: ......................................................................... 0
230
  max: ......................................................................... 9
231
  mean: ........................................................................ 0.1
232
  median: ...................................................................... 0
233
  p95: ......................................................................... 1
234
  p99: ......................................................................... 1
235
http.responses: ................................................................ 9000
236
vusers.completed: .............................................................. 3000
237
vusers.created: ................................................................ 3000
238
vusers.created_by_name.0: ...................................................... 3000
239
vusers.failed: ................................................................. 0
240
vusers.session_length:
241
  min: ......................................................................... 1.1
242
  max: ......................................................................... 20.4
243
  mean: ........................................................................ 1.9
244
  median: ...................................................................... 1.7
245
  p95: ......................................................................... 2.4
246
  p99: ......................................................................... 4.9

Bun.js

1
➜  benchmark bun -v
2
1.1.21
3
➜  benchmark npm run bench:artillery:bun
4

5
> [email protected] bench:artillery:bun
6
> artillery run artillery.yaml
7

8
Test run id: txg9b_bhhmharkmpc6g57bxp5zqmm854rcb_dq49
9
Phase started: unnamed (index: 0, duration: 60s) 20:44:33(+0300)
10

11
--------------------------------------
12
Metrics for period to: 20:44:40(+0300) (width: 6.208s)
13
--------------------------------------
14

15
http.codes.200: ................................................................ 909
16
http.downloaded_bytes: ......................................................... 10908
17
http.request_rate: ............................................................. 160/sec
18
http.requests: ................................................................. 910
19
http.response_time:
20
  min: ......................................................................... 0
21
  max: ......................................................................... 2
22
  mean: ........................................................................ 0.1
23
  median: ...................................................................... 0
24
  p95: ......................................................................... 1
25
  p99: ......................................................................... 1
26
http.responses: ................................................................ 909
27
vusers.completed: .............................................................. 303
28
vusers.created: ................................................................ 304
29
vusers.created_by_name.0: ...................................................... 304
30
vusers.failed: ................................................................. 0
31
vusers.session_length:
32
  min: ......................................................................... 1.3
33
  max: ......................................................................... 18.4
34
  mean: ........................................................................ 2.5
35
  median: ...................................................................... 2
36
  p95: ......................................................................... 4.2
37
  p99: ......................................................................... 13.1
38

39

40
--------------------------------------
41
Metrics for period to: 20:44:50(+0300) (width: 9.999s)
42
--------------------------------------
43

44
http.codes.200: ................................................................ 1500
45
http.downloaded_bytes: ......................................................... 18000
46
http.request_rate: ............................................................. 150/sec
47
http.requests: ................................................................. 1500
48
http.response_time:
49
  min: ......................................................................... 0
50
  max: ......................................................................... 1
51
  mean: ........................................................................ 0.1
52
  median: ...................................................................... 0
53
  p95: ......................................................................... 1
54
  p99: ......................................................................... 1
55
http.responses: ................................................................ 1500
56
vusers.completed: .............................................................. 500
57
vusers.created: ................................................................ 500
58
vusers.created_by_name.0: ...................................................... 500
59
vusers.failed: ................................................................. 0
60
vusers.session_length:
61
  min: ......................................................................... 1.3
62
  max: ......................................................................... 9.9
63
  mean: ........................................................................ 1.9
64
  median: ...................................................................... 1.8
65
  p95: ......................................................................... 2.5
66
  p99: ......................................................................... 3.1
67

68

69
--------------------------------------
70
Metrics for period to: 20:45:00(+0300) (width: 9.999s)
71
--------------------------------------
72

73
http.codes.200: ................................................................ 1500
74
http.downloaded_bytes: ......................................................... 18000
75
http.request_rate: ............................................................. 150/sec
76
http.requests: ................................................................. 1500
77
http.response_time:
78
  min: ......................................................................... 0
79
  max: ......................................................................... 1
80
  mean: ........................................................................ 0.1
81
  median: ...................................................................... 0
82
  p95: ......................................................................... 1
83
  p99: ......................................................................... 1
84
http.responses: ................................................................ 1500
85
vusers.completed: .............................................................. 500
86
vusers.created: ................................................................ 500
87
vusers.created_by_name.0: ...................................................... 500
88
vusers.failed: ................................................................. 0
89
vusers.session_length:
90
  min: ......................................................................... 1.2
91
  max: ......................................................................... 8.2
92
  mean: ........................................................................ 1.9
93
  median: ...................................................................... 1.8
94
  p95: ......................................................................... 2.4
95
  p99: ......................................................................... 3.2
96

97

98
--------------------------------------
99
Metrics for period to: 20:45:10(+0300) (width: 9.999s)
100
--------------------------------------
101

102
http.codes.200: ................................................................ 1501
103
http.downloaded_bytes: ......................................................... 18012
104
http.request_rate: ............................................................. 150/sec
105
http.requests: ................................................................. 1500
106
http.response_time:
107
  min: ......................................................................... 0
108
  max: ......................................................................... 13
109
  mean: ........................................................................ 0.1
110
  median: ...................................................................... 0
111
  p95: ......................................................................... 1
112
  p99: ......................................................................... 1
113
http.responses: ................................................................ 1501
114
vusers.completed: .............................................................. 500
115
vusers.created: ................................................................ 500
116
vusers.created_by_name.0: ...................................................... 500
117
vusers.failed: ................................................................. 0
118
vusers.session_length:
119
  min: ......................................................................... 1.1
120
  max: ......................................................................... 15
121
  mean: ........................................................................ 1.8
122
  median: ...................................................................... 1.7
123
  p95: ......................................................................... 2.2
124
  p99: ......................................................................... 2.9
125

126

127
--------------------------------------
128
Metrics for period to: 20:45:20(+0300) (width: 9.999s)
129
--------------------------------------
130

131
http.codes.200: ................................................................ 1500
132
http.downloaded_bytes: ......................................................... 18000
133
http.request_rate: ............................................................. 150/sec
134
http.requests: ................................................................. 1500
135
http.response_time:
136
  min: ......................................................................... 0
137
  max: ......................................................................... 4
138
  mean: ........................................................................ 0.1
139
  median: ...................................................................... 0
140
  p95: ......................................................................... 1
141
  p99: ......................................................................... 1
142
http.responses: ................................................................ 1500
143
vusers.completed: .............................................................. 500
144
vusers.created: ................................................................ 500
145
vusers.created_by_name.0: ...................................................... 500
146
vusers.failed: ................................................................. 0
147
vusers.session_length:
148
  min: ......................................................................... 1.2
149
  max: ......................................................................... 11.6
150
  mean: ........................................................................ 1.7
151
  median: ...................................................................... 1.6
152
  p95: ......................................................................... 2.1
153
  p99: ......................................................................... 5.5
154

155

156
Phase completed: unnamed (index: 0, duration: 60s) 20:45:33(+0300)
157

158
--------------------------------------
159
Metrics for period to: 20:45:30(+0300) (width: 9.999s)
160
--------------------------------------
161

162
http.codes.200: ................................................................ 1500
163
http.downloaded_bytes: ......................................................... 18000
164
http.request_rate: ............................................................. 150/sec
165
http.requests: ................................................................. 1500
166
http.response_time:
167
  min: ......................................................................... 0
168
  max: ......................................................................... 1
169
  mean: ........................................................................ 0.1
170
  median: ...................................................................... 0
171
  p95: ......................................................................... 1
172
  p99: ......................................................................... 1
173
http.responses: ................................................................ 1500
174
vusers.completed: .............................................................. 500
175
vusers.created: ................................................................ 500
176
vusers.created_by_name.0: ...................................................... 500
177
vusers.failed: ................................................................. 0
178
vusers.session_length:
179
  min: ......................................................................... 1.1
180
  max: ......................................................................... 8.5
181
  mean: ........................................................................ 1.7
182
  median: ...................................................................... 1.6
183
  p95: ......................................................................... 2.1
184
  p99: ......................................................................... 3
185

186

187
--------------------------------------
188
Metrics for period to: 20:45:40(+0300) (width: 4.103s)
189
--------------------------------------
190

191
http.codes.200: ................................................................ 590
192
http.downloaded_bytes: ......................................................... 7080
193
http.request_rate: ............................................................. 161/sec
194
http.requests: ................................................................. 590
195
http.response_time:
196
  min: ......................................................................... 0
197
  max: ......................................................................... 2
198
  mean: ........................................................................ 0.1
199
  median: ...................................................................... 0
200
  p95: ......................................................................... 1
201
  p99: ......................................................................... 1
202
http.responses: ................................................................ 590
203
vusers.completed: .............................................................. 197
204
vusers.created: ................................................................ 196
205
vusers.created_by_name.0: ...................................................... 196
206
vusers.failed: ................................................................. 0
207
vusers.session_length:
208
  min: ......................................................................... 1
209
  max: ......................................................................... 7.2
210
  mean: ........................................................................ 2
211
  median: ...................................................................... 1.7
212
  p95: ......................................................................... 4.2
213
  p99: ......................................................................... 6.4
214

215

216
All VUs finished. Total time: 1 minute, 3 seconds
217

218
--------------------------------
219
Summary report @ 20:45:36(+0300)
220
--------------------------------
221

222
http.codes.200: ................................................................ 9000
223
http.downloaded_bytes: ......................................................... 108000
224
http.request_rate: ............................................................. 150/sec
225
http.requests: ................................................................. 9000
226
http.response_time:
227
  min: ......................................................................... 0
228
  max: ......................................................................... 13
229
  mean: ........................................................................ 0.1
230
  median: ...................................................................... 0
231
  p95: ......................................................................... 1
232
  p99: ......................................................................... 1
233
http.responses: ................................................................ 9000
234
vusers.completed: .............................................................. 3000
235
vusers.created: ................................................................ 3000
236
vusers.created_by_name.0: ...................................................... 3000
237
vusers.failed: ................................................................. 0
238
vusers.session_length:
239
  min: ......................................................................... 1
240
  max: ......................................................................... 18.4
241
  mean: ........................................................................ 1.9
242
  median: ...................................................................... 1.7
243
  p95: ......................................................................... 2.5
244
  p99: ......................................................................... 5

Breakdown Of Metrics

HTTP Codes: The number of successful HTTP responses (200 OK) received.
Downloaded Bytes: The total amount of data downloaded during the test.
Request Rate: The number of HTTP requests sent per second.
Response Time: The time taken for a server to respond to a request, including metrics like min, max, mean, median, p95 * (95th percentile), and p99 (99th percentile).
Virtual Users (VUs): The number of simulated users interacting with the server, including those completed, created, failed, and their session lengths.

Results

In the Artillery benchmark tests, we evaluated Node.js, Deno, and Bun.js by simulating real-world scenarios with a significant number of virtual users (VUs).

Node.js:

HTTP Codes 200: Successfully handled 9000 requests.
Request Rate: Maintained an average of 140 requests per second.
Response Time: The mean response time was low at 0.1 ms, with a maximum of 15 ms.
Virtual Users Completed: 3000 VUs completed their sessions, with session lengths ranging from 1.1 to 17.6 seconds.

Deno.js:

HTTP Codes 200: Handled 9000 successful responses.
Request Rate: Averaged around 150 requests per second.
Response Time: Consistently low response times, with a mean of 0.1 ms and a maximum of 9 ms.
Virtual Users Completed: 3000 VUs completed their sessions, with session lengths between 1.1 and 20.4 seconds.

Bun.js:

HTTP Codes 200: Also handled 9000 requests successfully.
Request Rate: Similar to Deno, with 150 requests per second.
Response Time: Very low mean response time of 0.1 ms, with a maximum of 13 ms.
Virtual Users Completed: 3000 VUs completed their sessions, with session lengths from 1 to 18.4 seconds.

Overall, all three runtimes handled high concurrent traffic excellently with minimal response times.

Deno and Bun.js had slightly higher request rates than Node.js.

All three maintained low response times, showing efficient performance under load.

The consistent handling of 3000 virtual users across all tests demonstrates the stability and reliability of each runtime in real-world scenarios.

Final Conclusion

Based on the benchmarks, Deno appears to be the fastest runtime. It consistently demonstrated the highest request rates, lowest response times, and handled the largest amount of data throughput.

While Deno excels in raw performance, the choice of runtime should also consider factors like ecosystem maturity, community support, and ease of use.

However, it’s important to note that software is constantly evolving with updates and optimizations. The performance differences are slight, making it a difficult decision.

Each runtime has its strengths, and the best choice depends on your specific project requirements and context.

Trevor I. Lasn

Who is the fastest? Node.js, Bun.js, or Deno.js

A detailed comparison of Node.js, Bun.js, and Deno.js runtime performance

A runtime is the engine under the hood of your JavaScript applications.

Engine

Runtime

How They Work Together

Importance of Speed in JavaScript Runtimes

Benchmarking Runtimes Using AutoCannon

Hardware Overview

Key Metrics

Understanding the Metrics (example)

Breakdown of Metrics

Node.js (v22.5.1)

Bun.js (v1.1.21)

Deno (v1.45.5)

Results

Conclusion

Benchmarking Runtimes Using Artillery

Node.js

Deno.js

Bun.js

Breakdown Of Metrics

Results

Node.js:

Deno.js:

Bun.js:

Final Conclusion

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