diff options
| -rw-r--r-- | compiler/rustc_data_structures/src/stable_hasher.rs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_data_structures/src/stable_hasher.rs b/compiler/rustc_data_structures/src/stable_hasher.rs index 354f9dd93cc..b3958af7a4d 100644 --- a/compiler/rustc_data_structures/src/stable_hasher.rs +++ b/compiler/rustc_data_structures/src/stable_hasher.rs @@ -552,7 +552,8 @@ pub fn hash_stable_hashmap<HCX, K, V, R, SK, F>( SK: HashStable<HCX> + Ord, F: Fn(&K, &HCX) -> SK, { - let mut entries: Vec<_> = map.iter().map(|(k, v)| (to_stable_hash_key(k, hcx), v)).collect(); + let mut entries: SmallVec<[_; 3]> = + map.iter().map(|(k, v)| (to_stable_hash_key(k, hcx), v)).collect(); entries.sort_unstable_by(|&(ref sk1, _), &(ref sk2, _)| sk1.cmp(sk2)); entries.hash_stable(hcx, hasher); } |