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resolves #1134 (conservatively)
revert to what there were before atomic wait

resolves microsoft#1134 (conservatively)
revert to what there were before atomic wait
@AlexGuteniev AlexGuteniev requested a review from a team as a code owner August 4, 2020 06:23
@StephanTLavavej StephanTLavavej added the performance Must go faster label Aug 4, 2020
Co-authored-by: Casey Carter <cartec69@gmail.com>
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It looks like we can remove #include <thread> from <execution> now.

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LGTM with minor nitpicks about including more headers than we need and about lots of conversions

@BillyONeal BillyONeal changed the title cache HW thread count in <execution> Cache hardware thread count for <execution> Aug 5, 2020
@StephanTLavavej StephanTLavavej merged commit 392fb6d into microsoft:master Aug 9, 2020
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Thanks for restoring this performance optimization! 🚀

@AlexGuteniev AlexGuteniev deleted the cache_execution_hw_concurrency branch August 10, 2020 03:12
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<execution>: cache thread::hardware_concurrency

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