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Comment by matt2000 | Hacker News Reader

matt2000

Does anyone have a reliable place for browser javascript benchmarks? Some searching only brought up a range of promotional type stuff from browser makers and old articles. Thanks!

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https://arewefastyet.com/#machine=29 has most popular benchmarks across most JavaScript eninges on multiple platforms

Edit: actually this view is probably better for people who don't care about JavaScript engine internals: https://arewefastyet.com/#machine=31

The focus on JS benchmarks is becoming ludicrous. By far the biggest performance issue is DOM/CSS layout. JS is so fast on all browsers that the performance differences don't matter at all anymore, except for initial load (and if you're loading that much code on initial page load, you should re-evaluate your architecture).

I agree 100%, but they were asking for a place with JavaScript benchmarks, so I gave my favorite.

Modern frameworks have worked hard to mitigate DOM bottlenecks, thus pure JS bottlenecks are now a thing. Especially data-rich applications. Reflow and paint performance is still an issue but the focus on JS is worthwhile.

Have you measured this? Do you actually build or use specific apps where the dominant factor is JS execution time and not layout or network time?

Yes. String-processing tweets (linkify and emoji-insert) and crunching numbers for time series line charts were two areas where we saw some lag. It was React so these bottlenecks were happening during virtual DOM rendering.

And realizing GP was talking about client-side, but also don't forget server-side, where DOM doesn't exist and the hyper-focus on pure-JS perf is much appreciated.

What's Chrome turbofan?

It's Chrome's (or more accurately v8's) new-ish optimizing compiler. For some of the tests they like to disable the non-optimizing compiler to see how just the optimizing one runs alone with no fallback.

Dead it looks like.

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