IndexSet.union performance improvement #17666
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@swift-ci Please test |
phausler
approved these changes
Jul 2, 2018
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Shepherding an updated copy of this patch in #28325. Closing this copy out. Thanks! |
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Improves performance of IndexSet.union by replacing a loop with a struct copy of the more sparse set. Same change as #1603 merged into swift-corelibs-foundation.