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Precompute vector length in smart_resolve_path_fragment

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This commit is contained in:
Dániel Buga 2020-12-20 21:38:41 +01:00
parent 93d5a8025d
commit 62f593bda9
1 changed files with 2 additions and 1 deletions
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3
compiler/rustc_resolve/src/late.rs
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@ -1891,8 +1891,9 @@ impl<'a: 'ast, 'b, 'ast> LateResolutionVisitor<'a, 'b, 'ast> {
self.r.trait_map.insert(id, traits);
}
let mut std_path = vec![Segment::from_ident(Ident::with_dummy_span(sym::std))];
let mut std_path = Vec::with_capacity(1 + path.len());
std_path.push(Segment::from_ident(Ident::with_dummy_span(sym::std)));
std_path.extend(path);
if self.r.primitive_type_table.primitive_types.contains_key(&path[0].ident.name) {