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| author | Dániel Buga <bugadani@gmail.com> | 2020-12-20 21:38:41 +0100 |
|---|---|---|
| committer | Dániel Buga <bugadani@gmail.com> | 2020-12-20 21:38:41 +0100 |
| commit | 62f593bda9eff51efdbc3172c3ee768cb3528b1f (patch) | |
| tree | e4178a64e2857305e4db68b1ec4ad370560073f2 | |
| parent | 93d5a8025dd53469c0ea80b645a3087a1d87bb57 (diff) | |
| download | rust-62f593bda9eff51efdbc3172c3ee768cb3528b1f.tar.gz rust-62f593bda9eff51efdbc3172c3ee768cb3528b1f.zip | |
Precompute vector length in smart_resolve_path_fragment
| -rw-r--r-- | compiler/rustc_resolve/src/late.rs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_resolve/src/late.rs b/compiler/rustc_resolve/src/late.rs index 02a7bc0b622..4beaf6bfa80 100644 --- a/compiler/rustc_resolve/src/late.rs +++ b/compiler/rustc_resolve/src/late.rs @@ -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) { |