diff options
| author | Manish Goregaokar <manishsmail@gmail.com> | 2016-02-27 08:04:54 +0530 |
|---|---|---|
| committer | Manish Goregaokar <manishsmail@gmail.com> | 2016-02-27 10:52:02 +0530 |
| commit | 543c6a37c012e1bc4f2c64df541a2782a91021ac (patch) | |
| tree | 52af2fe6a635222bfae87d1936fa1f6a5bc449eb /src/libstd/sys/unix/stack_overflow.rs | |
| parent | 2d1843ad9dd398102c6550be2688ae955b19499c (diff) | |
| parent | 31fef237b639fac3a1b719110fa0cfad3df44332 (diff) | |
| download | rust-543c6a37c012e1bc4f2c64df541a2782a91021ac.tar.gz rust-543c6a37c012e1bc4f2c64df541a2782a91021ac.zip | |
Rollup merge of #31929 - dotdash:less_rallocx, r=alexcrichton
When foldings Substs, we map over VecPerParamSpace instances using EnumeratedItems which does not provide an accurate size_hint() in its Iterator implementation. This leads to quite a large number or reallocations. Providing a suitable size_hint() implementation reduces the time spent in item-bodies checking quite a bit. ``` crate | before | after | ~change -------|------------------------- core | 7.28s | 5.44s | -25% std | 2.07s | 1.88s | -9.2% syntax | 8.86s | 8.30s | -6.3% ```
Diffstat (limited to 'src/libstd/sys/unix/stack_overflow.rs')
0 files changed, 0 insertions, 0 deletions