Antoine Pitrou <[email protected]> added the comment:
I've bisected myself and the culprit seems to be
b0a7a037b8fde56b62f886d5188bced7776777b4 ("""bpo-31179: Make dict.copy() up to
5.5 times faster.""").
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nosy: +yselivanov
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Python tracker <[email protected]>
<https://bugs.python.org/issue34042>
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