Commits on Feb 26, 2016

1. Avoid excessive reallocations during item-bodies checking …

   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%
   ```

   

   dotdash committed Feb 26, 2016
   Configuration menu

   • View commit details
   • Copy full SHA for 31fef23
   • Browse repository at this point

   Copy the full SHA

   31fef23 View commit details

   Browse the repository at this point in the history