cgo callback performance

[jbedard]

I'm looking to switch from https://github.com/smacker/go-tree-sitter but I'm finding the performance of https://github.com/tree-sitter/go-tree-sitter to be noticeable slower.

The main difference I'm seeing is the use of cgocallback within the cgo calls. Is this c calling back into golang? Is that necessary?

In this scenario the performance was ~40-50% slower then smacker. Note the 3 main blocks shown are the Tree.Close(), QueryMatch.Next() and ParseWithOptions() calls:

smacker (21s total):

tree-sitter (29s total):