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Lighthouse performance scoring | Chrome for Developers
How metric scores are determined Once Lighthouse has gathered the performance metrics (mostly reported in milliseconds), it converts each raw metric value into a metric score from 0 to 100 by looking where the metric value falls on its Lighthouse scoring distribution. The scoring distribution is a log-normal distribution derived from the performance metrics of real website performance data on HTTP
ローカルストレージに簡単な解決策はない
原文：“There is no simple solution for local storage” (on March 5, 2012 by Chris Heilmann) 要約：私たちは良いデータストアとして localStorage を推奨するのをやめなければならない。パフォーマンスがひどく損なわれるからだ。しかし残念なことに、代わりとなるものはまだ完全にサポートされておらず、また簡単に実装できるものでもない。 Web 開発において、うますぎる話に出くわすことは常々だ。そういったもののいくつかは良いもので、だからこそそれが「すべて」として目立ってしまい、開発者を使うように仕向けてしまう。しかし、多くの場合、良いと思われていたものはそこまで良いものではない。また、しばらく使ってみてはじめて「間違っていた」と気づかされるものなのだ。 そんなもののひとつに、localStorage がある
Reflows & Repaints: CSS Performance making your JavaScript slow? – Nicole Sullivan
Reflows & Repaints: CSS Performance making your JavaScript slow? I’ve been tweeting and posting to delicious about reflows and repaints, but hadn’t mentioned either in a talk or blog post yet. I first started thinking about reflows and repaints after a firey exchange with Mr. Glazman at ParisWeb. I may be stubborn, but I did actually listen to his arguments. 🙂 Stoyan and I began discussing wa
web.dev
Stay organized with collections Save and categorize content based on your preferences. Explore our growing collection of courses on key web design and development subjects. An industry expert has written each course, helped by members of the Chrome team. Follow the modules sequentially, or dip into the topics you most want to learn about.
Gmail for Mobile HTML5 Series: Reducing Startup Latency
On April 7th, Google launched a new version of Gmail for mobile for iPhone and Android-powered devices. We shared the behind-the-scenes story through this blog and decided to share more of what we've learned in a brief series of follow-up blog posts. This week, I'll talk about how modularization can be used to greatly reduce the startup latency of a web app. To a user, the startup latency of an HT
web.dev
Stay organized with collections Save and categorize content based on your preferences. Explore our growing collection of courses on key web design and development subjects. An industry expert has written each course, helped by members of the Chrome team. Follow the modules sequentially, or dip into the topics you most want to learn about. This course is designed for those new to web performance, a
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Introducing Page Speed mobile analysis, on Google Chrome for Android