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Improve estimation of capacity in Vec::from_iter

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Closes #48994
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AngelicosPhosphoros 2021-12-20 23:58:45 +03:00 • committed by Mark Rousskov
parent 2f004d2d40
commit ea570c689c
2 changed files with 9 additions and 3 deletions
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2
library/alloc/src/raw_vec.rs
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@ -108,7 +108,7 @@ impl<T, A: Allocator> RawVec<T, A> {
// to round up a request of less than 8 bytes to at least 8 bytes.
// - 4 if elements are moderate-sized (<= 1 KiB).
// - 1 otherwise, to avoid wasting too much space for very short Vecs.
const MIN_NON_ZERO_CAP: usize = if mem::size_of::<T>() == 1 {
pub(crate) const MIN_NON_ZERO_CAP: usize = if mem::size_of::<T>() == 1 {
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} else if mem::size_of::<T>() <= 1024 {
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