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446 points talboren | 2 comments | 27 Aug 25 09:43 UTC | HN request time: 0s | source

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vintagedave ◴[27 Aug 25 09:49 UTC] No.45037415[source]▶

I've read comments online (here on HN) that Github has been rewriting their UI in React and that it's got slower since. I have no knowledge if this is true or not (ie React -> speed direct correlation), and my own projects are small enough not to see any performance impact.

Does anyone have concrete information?

replies(2): >>45039147 #>>45039199 #

1. fleebee ◴[27 Aug 25 13:11 UTC] No.45039199[source]▶

>>45037415 #

I came across a blog post[1] (HN thread[2]) recently that sheds some light on the issue. The tl;dr is that the PR view can render over 100 000 DOM nodes, many of which are invisible inline SVG nodes, and SPA routing makes navigation a lot slower.

[1]: https://yoyo-code.com/why-is-github-ui-getting-so-much-slowe...

[2]: https://news.ycombinator.com/item?id=44799861

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2. joshmoody24 ◴[27 Aug 25 14:37 UTC] No.45040341[source]▶

>>45039199 (TP) #

That blog post discovered that hard refreshing the page is faster than GitHub's SPA navigation, which led me to make this browser extension which makes GitHub navigation twice as fast:

https://chromewebstore.google.com/detail/make-github-great-a...

↑

The GitHub website is slow on Safari