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- add perf test that compares baseline frees vs frees after ThreadAlloc teardown - cover atexit/static destruction scenario to repro post-finalisation slowdown
The teardown code can be a performance bottleneck when a lot of deallocations occur after a thread begins to be torn down. This code tracks how many operations have occured after the thread has been torndown, and will stop performing the tidying with an exponential back-off. This takes the overhead on the microbenchmark from around 50x to 10x.
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Experiment to improve the performance post teardown.