[issue40521] [subinterpreters] Make free lists and unicode caches per-interpreter

[STINNER Victor]

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

bench_dict.patch: Microbenchmark on the C function PyDict_New() to measure the overhead of PR 20645.

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Added file: https://bugs.python.org/file49216/bench_dict.patch

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