[issue42197] Disable automatic update of frame locals during tracing

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

As I already wrote previously, I'm a supporter of requiring debuggers and profilers to explicitly call PyFrame_FastToLocalsWithError() and PyFrame_LocalsToFast(). It should only impact a minority of users, whereas the majority will benefit of way better performance, no?

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42197>
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