pest vs tree-sitter

[perehonchuk]

what is the difference between pest and tree-sitter? Where would you use tree-sitter instead of pest and vice-versa?

[tomtau]

tree-sitter is based on GLR, while pest is based on PEG; tree-sitter is more general / expressive, can do incremental parsing etc., so IMHO it's great for processing of programming languages (e.g. for IDEs where one need to re-parse the same files frequently). pest is simpler, so it's great for one-off processing of textual inputs where regular expressions aren't enough to capture their complexity (e.g. processing of custom configuration formats or DSLs)