I really don't like this. Don't post your AI-generated articles here. https://www.pangram.com/history/fce67fb4-4f6a-4eb4-a323-5048...

I like ast-grep and I think the changes are interesting, but it isn't fun reading an ai-generated article.

It seems like a lot of the speedup comes from using an arena, using realloc with offsets rather than raw pointers and some change to the graph that enabled this (though I don't want to re-read it to confirm).