dns-prefetchとpreconnect、そしてprefetchやprerenderとpreloadの併記 - Hail2u
dns-prefetchとpreconnect、そしてprefetchやprerenderとpreloadの併記 2014年10月より標準化作業が公開されたResource Hints仕様により、既存のrel=dns-prefetchとrel=prefetch、そしてrel=prerenderは置き換えられる可能性がある。この置き換えが起こる可能性は決して高くはなさそうなので、実装されているもののままでも構わないと思うが、link要素のrel属性は複数の値を取ることができるので、同時指定しても良い。 rel=dns-prefetchはrel=preconnectと完全に対応しているので、そのまま追加してやるだけになる。 <link href="//example.com" rel="preconnect dns-prefetch"> rel=prefetchとrel=prerenderはR
画像の最適化 | Web | Google Developers
Web performance is a crucial aspect of web development that focuses on the speed at which pages load, as well as how responsive they are to user input. When you optimize your website for performance, you're giving users a better experience. The initial release of this course focuses on web performance fundamentals, that beginners should find informative. Each module aims to demonstrate key perform
Building the DOM faster: speculative parsing, async, defer and preload – Mozilla Hacks - the Web developer blog
Building the DOM faster: speculative parsing, async, defer and preload In 2017, the toolbox for making sure your web page loads fast includes everything from minification and asset optimization to caching, CDNs, code splitting and tree shaking. However, you can get big performance boosts with just a few keywords and mindful code structuring, even if you’re not yet familiar with the concepts above
The Critical Request: How to Prioritise Requests to Improve Speed - Calibre
The Critical Request: How to Prioritise Requests to Improve Speed Serving a website seems pretty straightforward: send down some HTML, the browser figures out what resources to load next. Then, we wait patiently for the page to be ready. Little did you know, a lot is going on under the hood. Have you ever wondered how the browser figures out which assets should be requested and in what order? Toda
A Link: rel=preload Analysis From the Chrome Data Saver Team
Some of us in the Chrome Data Saver (Flywheel) team at Google (Simon Pelchat, Michael Buettner and Tom Bergan) experimented with the new preload directives as a means to improve page load performance for Chrome Data Saver users. We found our initial assumptions about preload to be wrong and decided to share our experiences in the hope they might benefit others. This post summarizes our findings. F
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