diff options
| -rw-r--r-- | compiler/rustc_index/src/bit_set.rs | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/compiler/rustc_index/src/bit_set.rs b/compiler/rustc_index/src/bit_set.rs index 12bde029494..d7e5c2b6056 100644 --- a/compiler/rustc_index/src/bit_set.rs +++ b/compiler/rustc_index/src/bit_set.rs @@ -654,15 +654,19 @@ impl<T: Idx> BitRelations<ChunkedBitSet<T>> for ChunkedBitSet<T> { impl<T: Idx> BitRelations<HybridBitSet<T>> for ChunkedBitSet<T> { fn union(&mut self, other: &HybridBitSet<T>) -> bool { - // FIXME: this is slow if `other` is dense, and could easily be - // improved, but it hasn't been a problem in practice so far. + // FIXME: This is slow if `other` is dense, but it hasn't been a problem + // in practice so far. + // If a a faster implementation of this operation is required, consider + // reopening https://github.com/rust-lang/rust/pull/94625 assert_eq!(self.domain_size, other.domain_size()); sequential_update(|elem| self.insert(elem), other.iter()) } fn subtract(&mut self, other: &HybridBitSet<T>) -> bool { - // FIXME: this is slow if `other` is dense, and could easily be - // improved, but it hasn't been a problem in practice so far. + // FIXME: This is slow if `other` is dense, but it hasn't been a problem + // in practice so far. + // If a a faster implementation of this operation is required, consider + // reopening https://github.com/rust-lang/rust/pull/94625 assert_eq!(self.domain_size, other.domain_size()); sequential_update(|elem| self.remove(elem), other.iter()) } |