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Right-size the VecDeque in coerce_unsized. #50963

Merged
merged 1 commit into from
May 22, 2018
Merged

Right-size the VecDeque in coerce_unsized. #50963

merged 1 commit into from
May 22, 2018

Commits on May 22, 2018

  1. Right-size the VecDeque in coerce_unsized. 

    The default capacity of a VecDeque is 8, which is excessive here. In a
"base incremental" check build of rustc-perf's tuple-stress benchmark,
this decreases total heap allocation by 26%. I couldn't see a clear
speedup, but it can't hurt.
    @nnethercote
    nnethercote committed May 22, 2018
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