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To render a webpage browsers needs to go through the complex dance of networking, parsing and painting before any content can be displayed to your user. Over the years, we’ve developed mechanisms and hacks to aid the browser at each stage of this process, but these have always come at some cost or trade-off.
How can we utilize modern web platform features to load our CSS as fast as possible? Should we still be inlining our critical content into the document or instead, how can HTTP/2 server push and Service Workers help us?
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It’s Friday afternoon, and Bill is frantically writing a rebuttal to a fiery political thread on Facebook. Smashing his keyboard violently with fingers of fury. Around 3 pm, a message flies in on the upper right-hand corner of his computer screen updating him of the final score of the Giants vs. Phillies game. “Giants lost?!? What?” At 4:30, another notification flies in telling him the pet food he was browsing online earlier in the week is available at his local pet store and he can grab it on the drive home. “Gizmo’s gun’ be happy tonight heh heh. JUMBONE for…
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HTTPS is a must for every website nowadays: Users are looking for the padlock when providing their details; Chrome and Firefox explicitly mark websites that provide forms on pages without HTTPS as being non-secure; it is an SEO ranking factor; and it has a serious impact on privacy in general.
Additionally, there is now more than one option to get an HTTPS certificate for free, so switching to HTTPS is only a matter of will.
This week was full of great browser vendor news: Safari 11 was announced with long-awaited features such as WebRTC and tracking protection, and a new Edge build with new CSS features is now available, too. But the past few days also had some valuable articles up their sleeves: about implementing HTTP/2 push, using datetime-local, and slimming down your CSS, for example. I collected everything in this reading list for you, so you don’t miss out on anything.
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Consumers typically have their own experiences when it comes to web hosting and their own opinions. If you search Google for reviews for any web hosting provider you’ll find dozens of results. Usually, there are a lot more negative reviews than there are positive ones. I thought I would flip that around and share some WordPress hosting challenges from the perspective of the WordPress host and how I frequently solve them.
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The landscape for the performance-minded developer has changed significantly in the last year or so, with the emergence of HTTP/2 being perhaps the most significant of all. No longer is HTTP/2 a feature we pine for. It has arrived, and with it comes server push!
Aside from solving common HTTP/1 performance problems (e.g., head of line blocking and uncompressed headers), HTTP/2 also gives us server push! Server push allows you to send site assets to the user before they’ve even asked for them.
Are you using progressive booting already? What about tree-shaking and code-splitting in React and Angular? Have you set up Brotli or Zopfli compression, OCSP stapling and HPACK compression? Also, how about resource hints, client hints and CSS containment — not to mention IPv6, HTTP/2 and service workers?
Back in the day, performance was often a mere afterthought. Often deferred till the very end of the project, it would boil down to minification, concatenation, asset optimization and potentially a few fine adjustments on the server’s config file.
Imagine a cloudy, rainy November evening. After a long day, you walk home along the streets, following the dimmed street lamps. Everybody seems to be busy, rushing somewhere, crossing paths with strangers and lonely stores. It’s dark and cold outside, and it’s difficult to see things through, so you decide to take a shortcut route to shorten the path.
Suddenly you see a bright light and music streaming from one of the remote corners of the street.
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