Microsoft Edge Team
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JavaScript must be downloaded, then run through a JIT compiler (even if you don’t use it), and then executed, and all this must be done before any of the JavaScript can start rendering the UI. This introduces a lot of delay before users can see the UI, especially on low-end devices.
View Transitions Break Incremental Rendering
Instead of showing users that this thing is the same as that thing, we’ve told them, perhaps with extra motion/panache, that even though these the…
Web font file size study: a variable font addition
The sum is smaller than the parts. A variable font that has both normal and heavy (bold) weight (and also everything in between) is slightly smaller…
I wasted a day on CSS selector performance to make a website load 2ms faster
It was at this point that the second penny dropped and I realised I’d been duped by a graphing misunderstanding and my own enthusiasm for improving…
kliksphilip
JPEG VS AVIF - The Battle of Compression
In this super thorough study I test one single HD image and come to vast sweeping conclusions about JPEG XL and AVIF. But that's still one image comparison…
Introducing Speed Brain: helping web pages load 45% faster
With the initial release of Speed Brain, we have designed a solution with important side effect prevention guardrails that completely removes the…
Eric Portis
Stoyan Stefanov
Trys Mudford