Introducing Deopt Explorer - TypeScript
Over the past few months, during the lead-up to the TypeScript 5.0 beta, our team spent a good portion of our time looking for ways to improve the performance of our compiler so that your projects build faster. One of the ways we improved was by looking into an oft overlooked aspect of many JavaScript VMs: inline caching. A Brief Primer on Inline Caching Inline caching is an optimization often use
JSã®ã‚¦ã‚§ãƒ–フレームワークã§é«˜é€Ÿãªãƒ«ãƒ¼ã‚¿ãƒ¼ã‚’実装ã™ã‚‹æ–¹æ³•
https://nseg.connpass.com/event/251366/ ã§ã®ç™ºè¡¨è³‡æ–™ã§ã™ã€‚
末尾呼ã³å‡ºã—最é©åŒ–ã¨JavaScript
è‘—è€…æƒ…å ± : kota-yata.com プレゼン動画 : https://www.youtube.com/watch?v=BcaPCnWZuvY
Optimizing ES2015 proxies in V8 · V8
Show navigation Proxies have been an integral part of JavaScript since ES2015. They allow intercepting fundamental operations on objects and customizing their behavior. Proxies form a core part of projects like jsdom and the Comlink RPC library. Recently, we put a lot of effort into improving the performance of proxies in V8. This article sheds some light on general performance improvement pattern
Chromiumã«ãŠã‘ã‚‹JavaScriptã®ã‚³ãƒ¼ãƒ‰ã‚ャッシュã«ã¤ã„㦠- Qiita
ã¯ã˜ã‚ã« ã“ã®è¨˜äº‹ã¯Chromium Browser Advent Calendar 2017ã®22日目ã®è¨˜äº‹ã«ãªã‚Šã¾ã™ã€‚ Chromiumプãƒã‚¸ã‚§ã‚¯ãƒˆã§Fetch APIã‚„Service Worker周りを担当ã—ã¦ã„ã‚‹horoã§ã™ã€‚ã¤ã„先日ã€Microsoft Edgeã®é–‹ç™ºè€…版やSafariã®é–‹ç™ºè€…版ã§ã‚‚Service WorkerãŒä½¿ãˆã‚‹ã‚ˆã†ã«ãªã£ãŸãã†ã§ã€éžå¸¸ã«å¬‰ã—ã„é™ã‚Šã§ã™ã€‚ ã•ã¦ã€ä»Šå›žã¯ã€Service Workerã«ã‚‚å°‘ã—関係ãŒã‚ã‚‹ã€JavaScriptã®ã‚³ãƒ¼ãƒ‰ã‚ャッシュã«ã¤ã„ã¦ã§ã™ã€‚ コードã‚ャッシュã¨ã¯ ã“ã®è³‡æ–™ã«ã‚ˆã‚‹ã¨ã€ç¾å®Ÿä¸–ç•Œã®Webページã§ã¯ã€V8ã®å®Ÿè¡Œæ™‚é–“ã®ã†ã¡JavaScriptã®ãƒ‘ースã«15-20%ã®æ™‚é–“ãŒã‹ã‹ã£ã¦ã„ã‚‹ã¨è¨€ã‚ã‚Œã¦ã„ã¾ã™ã€‚ ãã“ã§ã€Chromiumã§ã¯ã€é »ç¹ã«èªã¿è¾¼ã¾ã‚Œã‚‹JavaScriptファイルã«é–¢ã—ã¦ã€ãƒ‘ース処ç†ã«ã‚ˆã£ã¦ç”Ÿæˆã•ã‚Œã‚‹ãƒã‚¤ãƒˆã‚³ãƒ¼
The performance benefits of rel=noopener - JakeArchibald.com
If you have links to another origin, you should use rel="noopener", especially if they open in a new tab/window. <a href="http://example.com" target="_blank" rel="noopener"> Example site </a> Without this, the new page can access your window object via window.opener. Thankfully the origin security model of the web prevents it reading your page, but no-thankfully some legacy APIs mean it can naviga
モノモーフィズム（å˜ç›¸æ€§ï¼‰ã«ã¤ã„㦠– JavaScriptã®ãƒ‘フォーマンスを例㫠| POSTD
JavaScriptã®ãƒ‘フォーマンスã«é–¢ã™ã‚‹è¬›æ¼”やブãƒã‚°è¨˜äº‹ã§ã¯ã€ã‚ˆãå˜ç›¸çš„コードã®é‡è¦æ€§ãŒå¼·èª¿ã•ã‚Œã¦ã„ã¾ã™ã€‚ã—ã‹ã—ãªãŒã‚‰ã€ãƒ¢ãƒŽãƒ¢ãƒ¼ãƒ•ã‚£ã‚ºãƒ （å˜ç›¸æ€§ï¼‰ï¼ãƒãƒªãƒ¢ãƒ¼ãƒ•ã‚£ã‚ºãƒ （多相性）ã¨ã¯ä½•ãªã®ã‹ã€ãã‚ŒãŒã©ã†ãƒ‘フォーマンスã«å½±éŸ¿ã—ã¦ãã‚‹ã®ã‹ã¨ã„ã†ã“ã¨ã«ã¤ã„ã¦ã¯ã€ã‚ã¾ã‚Šåˆ†ã‹ã‚Šã‚„ã™ã説明ã•ã‚Œã¦ã„ã¾ã›ã‚“。ç§è‡ªèº«ã®è¬›æ¼”ã§ã‚‚ã€ï¼œï¼œ 1.良ã„åž‹ã€2.悪ã„åž‹ ＞＞的ãªäºŒè€…択一ã®ã‚¹ã‚¿ã‚¤ãƒ«ã«è¦ç´„ã—ã¦ã—ã¾ã†ã“ã¨ãŒå°‘ãªãã‚ã‚Šã¾ã›ã‚“。パフォーマンスã«é–¢ã™ã‚‹ã‚¢ãƒ‰ãƒã‚¤ã‚¹ã‚’求ã‚られるã“ã¨ãŒã‚ã‚Šã¾ã™ãŒã€ãã†ã„ã†æ™‚ã«æœ€ã‚‚よãリクエストã•ã‚Œã‚‹ã®ã¯ã€ モノモーフィズムã¨ã¯å®Ÿéš›ã®ã¨ã“ã‚何ãªã®ã‹ ã€ãƒãƒªãƒ¢ãƒ¼ãƒ•ã‚£ã‚ºãƒ ãŒãªãœç”Ÿã˜ã€ãã‚ŒãŒãªãœæ‚ªã„ã®ã‹ã€ã¨ã„ã†ã“ã¨ã‚’説明ã—ã¦æ¬²ã—ã„ã¨ã„ã†ã‚‚ã®ã§ã™ã€‚ å›°ã£ãŸã“ã¨ã«ã€ãã‚‚ãも「ãƒãƒªãƒ¢ãƒ¼ãƒ•ã‚£ã‚ºãƒ ã€ã¨ã„ã†ç”¨èªžãã®ã‚‚ã®ãŒç›¸å½“ã«å¤šé‡å®šç¾©ã•ã‚Œã¦ã„ã¾ã™ã€‚昔ãªãŒã‚‰ã®ã‚ªãƒ–ジェクト指å‘プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«ãŠã„ã¦ã¯ã€ ãƒãƒªãƒ¢
ã€Visual Studio Code】1.0 GAリリース予定日ã€æ±ºå®šï¼ - 好ããªæŠ€è¡“を好ãã¨è¨€ãˆã‚‹å¹¸ã› - AYA TOKURA BLOG - Site Home - MSDN Blogs
In Visual Studio 2022 17.10 Preview 2, we’ve introduced some UX updates and usability improvements to the Connection Manager. With these updates we provide a more seamless experience when connecting to remote systems and/or debugging failed connections. Please install the latest Preview to try it out. Read on to learn what the Connection ...
Google IO 2012
Follow the slides at http://goo.gl/U2vuT Performance optimization... what's that? Today, we're going to talk about Raw JavaScript Execution Performance with now ... Made in Germany Who cares about performance? You should. JavaScript Performance Matters
Two Reasons Functional Style Is Slow in SpiderMonkey
Two Reasons Functional Style Is Slow in SpiderMonkey Programming JS in a functional style is often more elegant but comes at the cost of performance. In the past, part of that performance problem has been due to native, C++ implementations of the most-often used higher-order operations like Array.prototype.forEach and friends. In a call like arr.forEach(f), the passed in kernel function f ends up
JSC Array optimization for adding new property - 枕を欹ã¦ã¦è´ã
This is a blog post for 12/6 VM advent calendar. See http://qiita.com/advent-calendar/2012/vm for more nice blog posts :) Introduction ECMA262ã«ã¨ã£ã¦Arrayã¯æœ€ã‚‚é‡è¦ãªObjectã®1ã¤ã§ã‚ã‚Š, loop内ã§é«˜ã„é »åº¦ã§ã‚¢ã‚¯ã‚»ã‚¹ã•ã‚Œã‚‹æ€§è³ªä¸Š, Arrayã®æœ€é©åŒ–ã¯engineã®å®Ÿè¡Œé€Ÿåº¦ã«å¤šå¤§ãªå½±éŸ¿ã‚’åŠã¼ã—ã¾ã™. ã“ã“ã§ã¯JavaScriptCoreã®è¡Œãªã£ã¦ã„ã‚‹Arrayã«å¯¾ã—ã¦æ–°ã—ã„propertyã‚’è¿½åŠ ã™ã‚‹å‡¦ç†ã®æœ€é©åŒ–を紹介ã—ã¾ã™. Background ECMA262ã«ãŠã„ã¦, Arrayã¯literalå½¢å¼ãªã‚‰ã°own propertyを最åˆã‹ã‚‰å®šç¾©ã§ãã¾ã™ãŒ, var array = [0, 1, 2, 3, 4]; console.lo
querySelectorAll vs getElementsByTagName · jsPerf
JavaScript performance comparison Test case created by Andrew Hedges on 2010-9-22 Preparation code <div> <ul> <li><a href="#">item 1</a></li> <li><a href="#">item 2</a></li> <li><a href="#">item 3</a></li> </ul> </div> Preparation code output <div> <ul> <li><a href="#">item 1</a></li> <li><a href="#">item 2</a></li> <li><a href="#">item 3</a></li> </ul> </div> Test runner Warning! For accurate res
æ–‡å—列繰り返ã—ベンãƒãƒžãƒ¼ã‚¯ take 3 - moriyoshiã®æ—¥è¨˜
ã“ã‚Œã®ç¶šã。 ãªã‚“ã‹ã‹ãªã‚ŠjitterãŒã‚ã‚‹ã¿ãŸã„ã§ãŠã‹ã—ãªçµæžœã«ãªã£ã¦ã‚‹ã‚“ã ã‘ã©ã€ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã”ã¨ã®ç‰¹å¾´ã¯å‡ºã¦ã‚‹ã®ã§ã€‚ - Chrome FF3.0.5 FF3.1b2 IE6.0 IE8.0b2 Opera Safari WebKit/r40352 concat_op 32 203 150 747586 453 156 51.5 32 join 36 478 596.5 562.5 234.5 445.5 87.5 38 hybrid 5 99.5 108.5 156 195.5 195.5 23.5 18 newbulk 0 38 52.5 47 15.5 54.5 1.5 2 ã¡ãªã¿ã«newbulkã®ã‚³ãƒ¼ãƒ‰ã¯ var newbulk = function(s, n) { var s, r = ''; while (n > 0) { if (n & 1) r += s; s += s
Faster JavaScript Trim
Note 1: The comparison is based on trimming the Magna Carta (over 27,600 characters) with a bit of leading and trailing whitespace 20 times on my personal system. However, the data you're trimming can have a major impact on performance, which is detailed below. Note 2: trim4 and trim6 are the most commonly found in JavaScript libraries today. Note 3: The aforementioned bad implementation is not in
ランã‚ング
ランã‚ング
ランã‚ング
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
Perflink
GitHub - vhf/v8-bailout-reasons: :wrench: A list of Crankshaft bailout reasons with examples
parens-and-perf.md
Improve generator performance by gzzhanghao · Pull Request #3283 · babel/babel
Optimization killers
push vs. [].length · jsPerf
{{#tags}}- {{label}}
{{/tags}}