Re: Reliable after-change-functions (via: Using incremental parsing in Emacs)

[Stefan Monnier]

> It should be obvious that sending a buffer as a single string is less
> efficient than letting tree-sitter access buffer text directly.  We
> just need an appropriate API for that (maybe there is one already, I
> didn't take a look at their sources since January).

My benchmark say that `buffer-string` takes about 1/3 the time of
`parse-partial-sexp`, so letting tree-sitter access our buffer text
directly is unlikely to give more than a 30% speed up.

It doesn't mean it wouldn't be a desirable optimization, but it does
mean that it likely won't make a large difference as to whether it's
"fast enough".


        Stefan