No, the "hg is fast" marketing claim that retreated to "hg is Big-O fast and you are dumb for caring about constant terms and factors even if they clearly dominate your use case" predates 2014 and the Facebook patches. These talking points were old in 2010. Mercurial was always dog slow and always gaslighting about it.

I'm glad BigCo made tools to serve their needs, but their needs aren't my needs or most peoples' needs.

> Mercurial has been rewritten in Rust

I'm glad they saw the light eventually! Ditto for the rest of the Rust Tooling Renaissance.