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rustc: Don't zero out arena chunks with vec::from_elem; that's slow because it calls the glue.

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This commit is contained in:
Patrick Walton 2012-03-28 21:04:13 -07:00
parent 2663018792
commit 5ce3d35f41
1 changed files with 3 additions and 1 deletions
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4
src/libstd/arena.rs
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@ -8,7 +8,9 @@ type chunk = {data: [u8], mut fill: uint};
type arena = {mut chunks: list::list<@chunk>};
fn chunk(size: uint) -> @chunk {
@{ data: vec::from_elem(size, 0u8), mut fill: 0u }
let mut v = [];
vec::reserve(v, size);
@{ data: v, mut fill: 0u }
}
fn arena_with_size(initial_size: uint) -> arena {