In DI, cache whether a memory object is a box #37328
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Boxes tend to have a small number of uses, so frequently finding the unique projection isn't too bad. Non-boxes, however, can have a large number of uses: for example, a class instance has expected uses proportionate to the number of stored properties. So if we do a linear scan of the uses on a non-box instruction, we'll scale quadratically. Fixes SR-14532.
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@swift-ci Please smoke test and merge |
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@swift-ci Please test linux |
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Boxes tend to have a small number of uses, so frequently finding the unique projection isn't too bad. Non-boxes, however, can have a large number of uses: for example, a class instance has expected uses proportionate to the number of stored properties. So if we do a linear scan of the uses on a non-box instruction, we'll scale quadratically.
Fixes SR-14532.