Remove use of multiprocessing from test_function_concurrency #1194
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multiprocessing forks the python process without doing exec. Many Python modules crash with fork without exec, see e.g. grpc: https://github.com/grpc/grpc/blob/master/doc/fork_support.md This test was flaky recently. Probably because of fork without exec.
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multiprocessing forks the python process without doing exec. Many Python modules crash with fork without exec, see e.g. grpc: https://github.com/grpc/grpc/blob/master/doc/fork_support.md and https://forums.developer.apple.com/forums/thread/737464
This test was flaky recently. Probably because of fork without exec.