Why is GitHub UI getting so much slower?
I couldn’t help but notice – GitHub UI has been getting slower and slower recently. Some things that were snappy before are hellishly slow nowadays. GitHub is doing something weird and I just can’t wrap my head around what’s going on there. You guys developing at GitHub, you’re using GitHub to develop it, right? Do you not see this? What’s going on? Whenever I bump into slow website which drives me nuts, I open the devtools and profile it. Who knows, maybe I find something to report and the problem will get fixed. To give one representative example, here’s a profile for switching from “Conversation” tab to “Files changed” tab on a PR. Before we look into the profile, notice that this takes over 5s. How is anything like that acceptable in 2025 is beyond me. Now, if you dive deep into…
