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Reuse a cursor from the pool if available (fixes #202)

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Blaž Hrastnik 2021-06-10 12:49:34 +09:00
parent 6b3c9d8ed3
commit aebdef8257
1 changed files with 5 additions and 1 deletions
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6
helix-core/src/syntax.rs
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@ -366,7 +366,11 @@ impl Syntax {
// prevents them from being moved. But both of these values are really just
// pointers, so it's actually ok to move them.
let mut cursor = QueryCursor::new(); // reuse a pool
// reuse a cursor from the pool if possible
let mut cursor = PARSER.with(|ts_parser| {
let highlighter = &mut ts_parser.borrow_mut();
highlighter.cursors.pop().unwrap_or_else(QueryCursor::new)
});
let tree_ref = unsafe { mem::transmute::<_, &'static Tree>(self.tree()) };
let cursor_ref = unsafe { mem::transmute::<_, &'static mut QueryCursor>(&mut cursor) };
let query_ref = unsafe { mem::transmute::<_, &'static Query>(&self.config.query) };