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Don't use Array.Reverse in ImmutableArray<T>.Builder.Reverse #2354
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The non-generic Array.Reverse does not perform well for non-primitive value types.
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LGTM. Thanks. |
stephentoub
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Jul 14, 2015
Don't use Array.Reverse in ImmutableArray<T>.Builder.Reverse
picenka21
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Feb 18, 2022
Don't use Array.Reverse in ImmutableArray<T>.Builder.Reverse Commit migrated from dotnet/corefx@77b5b79
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The non-generic
Array.Reversedoes not perform well for non-primitive value types.See the following for details:
dotnet/coreclr#1231
Note: I considered adding a common
ArrayHelpersclass, as there are some other uses ofArray.Reversein corefx. However, the other uses didn't seem to warrant the use of the improvedReverse:Array.Reverseonbyte[]which is a primitive type thatArray.Reversehas a fast-path for (example, example, etc.).Stack<T>.CopyTocallsArray.Reverseonly in a rare caseReadOnlyCollectionBuilder<T>is internal and it doesn't look likeReadOnlyCollectionBuilder.Reverseis actually used at all.