Auto merge of #102655 - joboet:windows_tls_opt, r=ChrisDenton

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Optimize TLS on Windows

This implements the suggestion in the current TLS code to embed the linked list of destructors in the `StaticKey` structure to save allocations. Additionally, locking is avoided when no destructor needs to be run. By using one Windows-provided `Once` per key instead of a global lock, locking is more finely-grained (this unblocks #100579).

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bors 2022-10-13 06:49:29 +00:00

parent 232d5e8e57 c9b4ba3b2c

commit 14eab1ab03

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