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Shrink SubregionOrigin. #64394

Merged
merged 1 commit into from Sep 18, 2019
Merged

Shrink SubregionOrigin. #64394

merged 1 commit into from Sep 18, 2019

Commits on Sep 12, 2019

  1. Shrink SubregionOrigin. 

    It's currently 120 bytes on x86-64, due to one oversized variant
(`Subtype`). This commit boxes `Subtype`'s contents, reducing the size
of `SubregionOrigin` to 32 bytes.

The change speeds things up by avoiding lots of `memcpy` calls, mostly
relating to `RegionConstraintData::constraints`, which is a `BTreeMap`
with `SubregionOrigin` values.
    @nnethercote
    nnethercote committed Sep 12, 2019
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