this post was submitted on 11 Apr 2025
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I don't think it's hyperbole to say a significant percentage of Git activity happens on GitHub (and other "foundries") – which are themselves a far cry from efficient.
My ultimate takeaway on the topic is that we're stuck with Git's very counterintuitive porcelain, and only satisfactory plumbing, regardless of performance/efficiency; but if Mercurial had won out, we'd still have its better interface (and IMO workflow), and any performance problems could've been addressed by a rewrite in C (or the Rust one that is so very slowly happening).
Imagine if their VCS operations were 10s of times less efficient 😉
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Most of the VCS ops in Hg are actually written in C.
GitHub is mostly written in Ruby, so that's not really a performance win.
Like I said, we're stuck with Git's UX, but we were never stuck with Hg's performance.