perf: fs optimizations - part 1 (#15873)

denoland · Sep 22, 2022 · 698a340 · 698a340
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diff --git a/cli/bench/fs/.gitignore b/cli/bench/fs/.gitignore
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+*.json
diff --git a/cli/bench/fs/README.md b/cli/bench/fs/README.md
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+## `fs` benchmarks
+
+### adding new benchmarks
+
+```js
+const copyFileSync = getFunction("copyFileSync");
+bench(() => copyFileSync("test", "test2"));
+
+// For functions with side-effects, clean up after `bench` like so:
+const removeSync = getFunction("removeSync");
+removeSync("test2");
+```
+
+### running
+
+```bash
+deno run -A --unstable run.mjs
+node run.js
+```
+
+### view report
+
+```bash
+deno run --allow-net=127.0.0.1:9000 serve.jsx
+# View rendered report at http://127.0.0.1:9000/
+```
diff --git a/cli/bench/fs/run.mjs b/cli/bench/fs/run.mjs
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+// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
+
+let total = 5;
+let current = "";
+const values = {};
+const runtime = typeof Deno !== "undefined" ? "deno" : "node";
+
+function bench(fun, count = 100000) {
+  if (total === 5) console.log(fun.toString());
+  const start = Date.now();
+  for (let i = 0; i < count; i++) fun();
+  const elapsed = Date.now() - start;
+  const rate = Math.floor(count / (elapsed / 1000));
+  console.log(`time ${elapsed} ms rate ${rate}`);
+  values[current] = values[current] || [];
+  values[current].push(rate);
+  if (--total) bench(fun, count);
+  else total = 5;
+}
+
+let fs;
+if (runtime === "node") {
+  fs = await import("fs");
+}
+
+const getFunction = runtime === "deno"
+  ? (name) => {
+    current = name;
+    return Deno[name];
+  }
+  : (name) => {
+    current = name;
+    return fs[name];
+  };
+
+const writeFileSync = getFunction("writeFileSync");
+writeFileSync("test", new Uint8Array(1024 * 1024), { truncate: true });
+
+const copyFileSync = getFunction("copyFileSync");
+bench(() => copyFileSync("test", "test2"), 10000);
+
+const truncateSync = getFunction("truncateSync");
+bench(() => truncateSync("test", 0));
+
+const lstatSync = getFunction("lstatSync");
+bench(() => lstatSync("test"));
+
+const { uid, gid } = lstatSync("test");
+
+const chownSync = getFunction("chownSync");
+bench(() => chownSync("test", uid, gid));
+
+const chmodSync = getFunction("chmodSync");
+bench(() => chmodSync("test", 0o666));
+
+// const cwd = getFunction("cwd");
+// bench(() => cwd());
+
+// const chdir = getFunction("chdir");
+// bench(() => chdir("/"));
+
+const readFileSync = getFunction("readFileSync");
+writeFileSync("test", new Uint8Array(1024), { truncate: true });
+bench(() => readFileSync("test"));
+
+writeFileSync(new URL(`./${runtime}.json`, import.meta.url), new TextEncoder().encode(JSON.stringify(values, null, 2)), { truncate: true });
diff --git a/cli/bench/fs/serve.jsx b/cli/bench/fs/serve.jsx
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+// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
+
+/** @jsx h */
+import results from "./deno.json" assert { type: "json" };
+import nodeResults from "./node.json" assert { type: "json" };
+import { h, ssr } from "https://crux.land/[email protected]";
+import { router } from "https://crux.land/[email protected]";
+
+function once(fn) {
+  let called = false;
+  let result;
+  return function () {
+    if (!called) {
+      called = true;
+      result = fn();
+      return result;
+    }
+    return result;
+  };
+}
+
+const body = once(() =>
+  Object.entries(results).map(([name, data]) => (
+    <tr>
+      <td class="border px-4 py-2">{name}</td>
+      <td class="border px-4 py-2">
+        {data.reduce((a, b) => a + b, 0) / data.length} ops/sec
+      </td>
+      <td class="border px-4 py-2">
+        {nodeResults[name].reduce((a, b) => a + b, 0) /
+          nodeResults[name].length} ops/sec
+      </td>
+    </tr>
+  ))
+);
+
+function App() {
+  return (
+    <table class="table-auto">
+      <thead>
+        <tr>
+          <th class="px-4 py-2">Benchmark</th>
+          <th class="px-4 py-2">Deno</th>
+          <th class="px-4 py-2">Node</th>
+        </tr>
+      </thead>
+      <tbody>
+        {body()}
+      </tbody>
+    </table>
+  );
+}
+
+const { serve } = Deno;
+serve(router({
+  "/": () => ssr(() => <App />),
+}));