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gh-87729: add LOAD_SUPER_ATTR instruction for faster super() (#103497)

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This speeds up `super()` (by around 85%, for a simple one-level
`super().meth()` microbenchmark) by avoiding allocation of a new
single-use `super()` object on each use.
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Carl Meyer 2023-04-24 16:22:14 -06:00 • committed by GitHub
parent 22bed58e53
commit 0dc8b50d33
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18 changed files with 783 additions and 408 deletions
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5
Lib/importlib/_bootstrap_external.py
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@ -439,7 +439,8 @@ _code_type = type(_write_atomic.__code__)
# Python 3.12a7 3523 (Convert COMPARE_AND_BRANCH back to COMPARE_OP)
# Python 3.12a7 3524 (Shrink the BINARY_SUBSCR caches)
# Python 3.12b1 3525 (Shrink the CALL caches)
# Python 3.12a7 3526 (Add instrumentation support)
# Python 3.12b1 3526 (Add instrumentation support)
# Python 3.12b1 3527 (Optimize super() calls)
# Python 3.13 will start with 3550
@ -456,7 +457,7 @@ _code_type = type(_write_atomic.__code__)
# Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
# in PC/launcher.c must also be updated.
MAGIC_NUMBER = (3526).to_bytes(2, 'little') + b'\r\n'
MAGIC_NUMBER = (3527).to_bytes(2, 'little') + b'\r\n'
_RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little') # For import.c