[issue39511] [subinterpreters] Per-interpreter singletons (None, True, False, etc.)

[Mark Shannon]

Mark Shannon <mark at hotpy.org> added the comment:

Having two CPUs write to the same cache line is a well known performance problem. There's nothing special about CPython here.

The proper name for it seems to be "cache line ping-pong", but a search for "false sharing" might be more informative.

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