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GH-100762: Don't call gen.throw() in gen.close(), unless necessary. (GH-101013)

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* Store exception stack depth in YIELD_VALUE's oparg and use it avoid expensive gen.throw() in gen.close() where possible.
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Mark Shannon 2023-01-24 17:25:37 +00:00 • committed by GitHub
parent daec3a463c
commit f02fa64bf2
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9 changed files with 39 additions and 12 deletions
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Lib/importlib/_bootstrap_external.py
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@ -429,7 +429,8 @@ def _write_atomic(path, data, mode=0o666):
# Python 3.12a1 3513 (Add CALL_INTRINSIC_1 instruction, removed STOPITERATION_ERROR, PRINT_EXPR, IMPORT_STAR)
# Python 3.12a1 3514 (Remove ASYNC_GEN_WRAP, LIST_TO_TUPLE, and UNARY_POSITIVE)
# Python 3.12a1 3515 (Embed jump mask in COMPARE_OP oparg)
# Python 3.12a1 3516 (Add COMAPRE_AND_BRANCH instruction)
# Python 3.12a1 3516 (Add COMPARE_AND_BRANCH instruction)
# Python 3.12a1 3517 (Change YIELD_VALUE oparg to exception block depth)
# Python 3.13 will start with 3550
@ -442,7 +443,7 @@ def _write_atomic(path, data, mode=0o666):
# Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
# in PC/launcher.c must also be updated.
MAGIC_NUMBER = (3516).to_bytes(2, 'little') + b'\r\n'
MAGIC_NUMBER = (3517).to_bytes(2, 'little') + b'\r\n'
_RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little') # For import.c