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The Three Cs: Concatenate, Compress, Cache

CSS Wizardry

Compressing them over the network: Which compression algorithm, if any, will we use? Caching them at the other end: How long should we cache files on a user’s device? This gave rise to heavy bundling and concatenation—why download three CSS files (half of our budget) if we could compress them into one?

Cache 337
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CSS and Network Performance

CSS Wizardry

CSS is critical to rendering a page—a browser will not begin rendering until all CSS has been found, downloaded, and parsed—so it is imperative that we get it onto a user’s device as fast as we possibly can. download any CSS needed for the current context (medium, screen size, resolution, orientation, etc.) Employ Critical CSS.

Network 278
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Netflix Android and iOS Studio Apps?—?now powered by Kotlin Multiplatform

The Netflix TechBlog

The high likelihood of unreliable network connectivity led us to lean into mobile solutions for robust client side persistence and offline support. Poor network connectivity coupled with frequently changing configuration values in response to user activity means that on-device rule evaluation is preferable to server-side evaluation.

Mobile 279
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Critical CSS? Not So Fast!

CSS Wizardry

Honestly, in this scenario, my advice is almost always: don’t bother trying to retrofit Critical CSS—just hash-n-cache 1 2 the living daylights out of your existing CSS bundles until you replatform and do it differently next time. priority request, and hits the network after the JavaScript. How do we automate it? performance.

Media 354
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WordPress Cache Enabler Plugin Updates

KeyCDN

In October 2015 KeyCDN released a free WordPress caching plugin called Cache Enabler. We did this because we wanted to give back to the WordPress community in the offering of a caching solution that was not complicated and most importantly, free. Over the last few months there have been many changes made to Cache Enabler.

Cache 116
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Netflix Cloud Packaging in the Terabyte Era

The Netflix TechBlog

From chunk encoding to assembly and packaging, the result of each previous processing step must be uploaded to cloud storage and then downloaded by the next processing step. Uploading and downloading data always come with a penalty, namely latency. For write operations, those challenges do not apply.

Cloud 242
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Optimising for High Latency Environments

CSS Wizardry

This gives fascinating insights into the network topography of our visitors, and how much we might be impacted by high latency regions. You can’t change that someone was from Nigeria, you can’t change that someone was on a mobile, and you can’t change their network conditions. Go and give it a quick read—the context will help.

Latency 222