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Add ArrayVec and AccumulateVec to reduce heap allocations during interning of slices #37270

Merged
merged 3 commits into from
Oct 26, 2016
Merged

Add ArrayVec and AccumulateVec to reduce heap allocations during interning of slices #37270

merged 3 commits into from
Oct 26, 2016

Commits on Oct 26, 2016

  1. Add AccumulateVec, a potentially stack-allocated vector. 

    AccumulateVec is generic over the Array trait, which is currently only
implemented for [T; 8].
    @Mark-Simulacrum
    Mark-Simulacrum committed Oct 26, 2016
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  2. Utilize AccumulateVec to avoid heap allocations in mk_{substs, type_l… 

    …ist, tup} calls.
    @Mark-Simulacrum
    Mark-Simulacrum committed Oct 26, 2016
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  3. Add size hint to Result's FromIterator implementation.

    @Mark-Simulacrum
    Mark-Simulacrum committed Oct 26, 2016
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