Editor's Draft April 16, 2013 This version: http://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HighResolutionTime2/Overview.html Latest version: http://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HighResolutionTime2/Overview.html Latest Editor's ... 続きを読む

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Today we’ll discuss how to improve the paint performance of your websites and Web apps. This is an area that we Web developers have only recently started looking at more closely, and it’s important because it could have an impact on your us... 続きを読む

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Supported browsers: Opera unsupported IE unsupported Safari unsupported Firefox unsupported Chrome unsupported Your browser may not support all of the functionality in this article. Your browser appears to support the functionality in this ar... 続きを読む

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[Resource Timing] Expose redirect timing information This change contains redirect timing information for W3C Resource Timing spec, and tests. Contributed by pan.deng@intel.com BUG=None Review URL: https://chromiumcodereview.appspot.com/13912... 続きを読む

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Wednesday, June 5, 2013 Improving Backbone App Performance At CSSConf and JSConf, one of the big themes was performance. I saw talks from Chrome engineers on Jank-busting, a talk from Adobe engineer Peter Flynn on performance tuning in Bracke... 続きを読む

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こんにちは。中原です。 CacooではGoogle+ Hangouts、Google Drive、Google Apps、ChromeウェブストアなどたくさんのGoogleの技術を利用しています。そこで先日2013/5/15～5/17にサンフランシスコで開かれたイベントGoogle I/O 2013に参加して来ました。 イベン... 続きを読む

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WebRTC Ilya Grigorik - @igrigorik Make The Web Fast Google Building Faster Websites crash course on web performance @igrigorik HTML CSS DOM CSSOM JavaScript Render Tree Layout PaintNetwork Critical rendering path In-app performance Web perfo... 続きを読む

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1.1 --- a/content/base/test/Makefile.in 1.2 +++ b/content/base/test/Makefile.in 1.3 @@ -624,16 +624,17 @@ MOCHITEST_FILES_C= \ 1.4 file_bothCSPheaders.html^headers^ \ 1.5 badMessageEvent2.eventsource \ 1.6 badMessageEvent2.eventsource^headers... 続きを読む

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Follow You can keep a track of all the latest and greatest content I'm putting up by subscribing to the RSS feeds below. How retro is that? Who says people don't use RSS anymore, eh?! Share If you like what you're reading you can also share i... 続きを読む

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May 2013 (4) April 2013 (4) March 2013 (6) February 2013 (6) January 2013 (2) December 2012 (4) November 2012 (6) October 2012 (6) September 2012 (3) August 2012 (5) July 2012 (5) June 2012 (11) May 2012 (3) April 2012 (4) March 2012 (9) Febr... 続きを読む

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Ilya Grigorik is a web performance engineer and developer advocate on the Make The Web Fast team at Google, where he spends his days and nights on making the web fast and driving adoption of performance best practices. You can find Ilya onlin... 続きを読む

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Timestamp: 05/24/13 00:12:19 (24 hours ago) Author: akling@apple.com Message: Typing in Safari's unified field causes unnecessary web content repaints. <​http://webkit.org/b/116703> Reviewed by Andy Estes. Source/WebCore: Break out an altern... 続きを読む

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Timestamp: 05/13/13 01:53:48 (8 days ago) Author: commit-queue@webkit.org Message: WebProcess consuming very high CPU on linkedin.com ​https://bugs.webkit.org/show_bug.cgi?id=115601 Patch by Zalan Bujtas <​zalan@apple.com> on 2013-05-13 Rev... 続きを読む

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Show lines around each change Show the changes in full context Timestamp: 04/30/13 15:29:22 (2 weeks ago) Author: fpizlo@apple.com Message: Release SunSpider 1.0 Rubber stamped by Maciej Stachowiak. perf/sunspider-1.0: Added. perf/sunspider-1... 続きを読む

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Supported browsers: Opera unsupported IE unsupported Safari unsupported Firefox unsupported Chrome supported Your browser may not support all of the functionality in this article. Your browser appears to support the functionality in this arti... 続きを読む

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The popular SunSpider JavaScript benchmark suite was originally released by the WebKit team over five years ago, in December 2007. It was engineered to be a balance of real JavaScript code from the web, and to serve as a blueprint for the sor... 続きを読む

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Timestamp: 04/23/13 15:36:20 (7 days ago) Author: akling@apple.com Message: Revert "Throttle resize events during live window resize." <​http://webkit.org/b/114292> <rdar://problem/13411454> <rdar://problem/13694839> Reviewed by Geoffrey Gar... 続きを読む

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Timestamp: 04/30/13 03:54:08 (2 hours ago) Author: commit-queue@webkit.org Message: Animations fail to start on ​http://www.google.com/insidesearch/howsearchworks/thestory/ ​https://bugs.webkit.org/show_bug.cgi?id=111244 Source/JavaScriptCo... 続きを読む

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1.1 --- a/content/base/test/Makefile.in 1.2 +++ b/content/base/test/Makefile.in 1.3 @@ -252,16 +252,17 @@ MOCHITEST_FILES_A = \ 1.4 file_bug782342.txt \ 1.5 test_bug782342.html \ 1.6 test_bug282547.html \ 1.7 bug282547.sjs \ 1.8 test_domparse... 続きを読む

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simonjam@chromium.org <simonjam@chromium.org@bbb929c8-8fbe-4397-9dbb-9b2b20218538> 続きを読む

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Tabstrip Animation Project - Introduction Apr 14th, 2013 | Comments I’ve had few slow weeks during which I attended some personal matters. Hopefully I’m back in full steam ahead again. Here’s a summary of recent events. Tabstrip animation ... 続きを読む

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The major search engines measured how much web site slowdowns hurt their business metrics: Bing – A page that was 2 seconds slower resulted in a 4.3% drop in revenue/user. Google – A 400 millisecond delay caused a 0.59% drop in searches/use... 続きを読む

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Stopwatch | By wwarby Flickr! こんにちわ、あなたのt32k、ごきげんいかがでしょう。みなさんはスマホWebアプリ作っていて、自分の作ったものは速いのか遅いのか気になりませんかね？僕は木に泣くりまくすてぃです。 そうゆうわけなもんで、表示速度とか計測し... 続きを読む

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“The Unicorn has a special ability to help it's master when in trouble. When tamed, they will not attack humans or tamed creatures, but will attack anything else with negative karma"The DevTools Heap Profiler and Timeline Memory view can be ... 続きを読む

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Complex ideas can be conveyed with just a single image. That’s the notion of the common expression, “A picture is worth a thousand words.” To provide rich user experiences, today’s web sites are incorporating lots of images. In most cases... 続きを読む

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"Latest Firefox development, live from Bugzilla!" follow us on twitter: @firefoxnightly. 続きを読む

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tl;dr Project Snappy has been retired and replaced by several smaller projects, including Async & Responsive. The objective of this project is to improve the responsiveness of Firefox and the Mozilla Platform by converting key components to m... 続きを読む

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またアニメーション... ボタンなどのUIにGPUアクセラレーションが効いたアニメーションをつけたとき、iOSにおいてはiPhone4か4SのWebViewあたり、Androidにおいては….まぁ機種依存的(げんなり)に、アニメーションの立ち上がりが遅いことがあります。 その辺を... 続きを読む

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Many a times we tend to add an image to a text for a Button. The pictorial representation of an action is easier for the user to understand and provides a visual identity for the application. In Android, there is a general perception that thi... 続きを読む

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The question has come up a few times lately, "What are the transparent bars in Chrome DevTools' timeline?" The short version is that a hollow frame means one of two things: your javascript main thread was busy doing other stuff that we forgot... 続きを読む

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Timestamp: 04/01/13 22:51:43 (3 hours ago) Author: simonjam@chromium.org Message: [Resource Timing] Expose timing information for iframes ​https://bugs.webkit.org/show_bug.cgi?id=103927 Reviewed by Nate Chapin. Source/WebCore: The only catch... 続きを読む

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Latest Comments - "To make small images, and keep them pretty on the many DPI leve...." Making the Mobile Web Faster - ""With which functions does my function share data?" Just remove...." Code Spelunking - "I have alway felt that security is... 続きを読む

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Timestamp: 03/28/13 08:48:28 (22 hours ago) Author: wangxianzhu@chromium.org Message: Non-painting fixed elements should not cause repaints on scroll ​https://bugs.webkit.org/show_bug.cgi?id=110430 Reviewed by Simon Fraser. Source/WebCore: T... 続きを読む

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February 26, 2013 5:35 pm | 1 Comment Two performance best practices are to add a far future expiration date and to delay loading resources (esp. scripts) until after the onload event. But it turns out that the combination of these best pract... 続きを読む

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Teleconferences: Weekly Face-to-face: we will meet during the W3C's annual Technical Plenary week (if space available); an additional face-to-face meeting may be scheduled by consent of the participants IRC channel: #webperf Scope As Web brow... 続きを読む

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Data Compression in Chrome Beta for Android Tuesday, March 05, 2013 Labels: mobile, spdy, ssl, webp Today’s Chrome Beta for Android update brings your saved passwords and autofill entries from your desktop to your phone and tablet. This rele... 続きを読む

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At my jQueryTO keynote on paint optimization, I mentioned the performance benefits of promoting DOM elements to a composite layer using GPU acceleration in Chrome. Moving compositing of page layers to the GPU can offer better efficiency than ... 続きを読む

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Supported browsers: Opera unsupported IE unsupported Safari unsupported Firefox unsupported Chrome supported Your browser may not support all of the functionality in this article. Your browser appears to support the functionality in this arti... 続きを読む

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Follow You can keep a track of all the latest and greatest content I'm putting up by subscribing to the RSS feeds below. How retro is that? Who says people don't use RSS anymore, eh?! Share If you like what you're reading you can also share i... 続きを読む

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In his presentation at An Event Apart in Atlanta 2013 Scott Jehl outlined a number of ways to build responsive Web sites that take performance in account. Here's my notes from his talk: Responsive and Responsible. Responsive design is just pa... 続きを読む

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#4 joh...@chromium.org I'll copy my analysis from https://groups.google.com/a/google.com/d/msg/chrome-touch/c2X_Usae8Gc/06Bnw1aYZnwJ: I was pondering this a while ago, and it seems there are various different cases to consider. As context, I'... 続きを読む

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Supported browsers: Opera unsupported IE unsupported Safari unsupported Firefox unsupported Chrome supported Your browser may not support all of the functionality in this article. Your browser appears to support all of the functionality in th... 続きを読む

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Continuous painting mode for paint profiling is now available in Chrome Canary. This article explains how you identify a problem in page painting time and how you can use this new tool to detect bottlenecks in painting performance. Investigat... 続きを読む

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First Last Prev Next This bug is not in your last search results. 続きを読む

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Note You need to log in before you can comment on or make changes to this bug. Description From James Simonsen 2012-04-25 12:34:21 PST This is the main work to plumb the resource timing information to the Performance Timeline. ------- Comment... 続きを読む

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自己紹介 ネイバージャパンのUIT(User Interface Technology)チームの裵完理(ベワニ)です。 概要 CSSやJavaScriptを使って複雑なデザインや動的なページを実装しているサービスが増えてきていますが、速度低下などの問題が発生しやすくなっています。これを100%... 続きを読む

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Increasingly, whether it’s on desktop or mobile, users want their web experience to be snappy and delightful. This means that even if the browser is busy rendering the page or loading in content, the user should still be able to scroll aroun... 続きを読む

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