> Are we back to "programming language X is slow" assertions? thought those had died long ago. Yes we are? The slow paths of mercurial have been rewritten in C

> Are we back to "programming language X is slow" assertions? thought those had died long ago. Yes we are? The slow paths of mercurial have been rewritten in C (and more recently in Rust) and improved the perf story substantially, without taking away from the wild modularity and extensibility hg always had.