From 18354ca4a70c0d53e4eae1bc53d2daafade6d202 Mon Sep 17 00:00:00 2001
From: Christian Clason <christian.clason@uni-due.de>
Date: Sat, 26 Jun 2021 18:01:24 +0200
Subject: [PATCH] fix(treesitter): set match limit for query cursors

Upstream tree-sitter raised the number of pending matches for a query cursor
from 32 to 64k in <https://github.com/tree-sitter/tree-sitter/commit/
78010722a49ed6224c773c22b0d25a8c9fbde584>, which severely impacted performance
for some highlighting queries. This uses the `ts_query_cursor_set_match_limit`
function introduced in <https://github.com/tree-sitter/tree-sitter/commit/
cd96552448a6e0d4eb27fc54b27cb5130c4b6f76> to manually set this back to the old
default of 32.

Fixes #14897
---
 src/nvim/lua/treesitter.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/nvim/lua/treesitter.c b/src/nvim/lua/treesitter.c
index c186928ae2..11d30aae09 100644
--- a/src/nvim/lua/treesitter.c
+++ b/src/nvim/lua/treesitter.c
@@ -1073,6 +1073,7 @@ static int node_rawquery(lua_State *L)
   // TODO(bfredl): these are expensive allegedly,
   // use a reuse list later on?
   TSQueryCursor *cursor = ts_query_cursor_new();
+  ts_query_cursor_set_match_limit(cursor, 32);
   ts_query_cursor_exec(cursor, query, node);
 
   bool captures = lua_toboolean(L, 3);