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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.
This commit is contained in:
Carl Meyer 2023-04-24 16:22:14 -06:00 • committed by GitHub
parent 22bed58e53
commit 0dc8b50d33
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GPG key ID: 4AEE18F83AFDEB23
18 changed files with 783 additions and 408 deletions
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5
Lib/dis.py
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@ -41,6 +41,7 @@ JUMP_BACKWARD = opmap['JUMP_BACKWARD']
FOR_ITER = opmap['FOR_ITER']
SEND = opmap['SEND']
LOAD_ATTR = opmap['LOAD_ATTR']
LOAD_SUPER_ATTR = opmap['LOAD_SUPER_ATTR']
CACHE = opmap["CACHE"]
@ -475,6 +476,10 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
argval, argrepr = _get_name_info(arg//2, get_name)
if (arg & 1) and argrepr:
argrepr = "NULL|self + " + argrepr
elif deop == LOAD_SUPER_ATTR:
argval, argrepr = _get_name_info(arg//4, get_name)
if (arg & 1) and argrepr:
argrepr = "NULL|self + " + argrepr
else:
argval, argrepr = _get_name_info(arg, get_name)
elif deop in hasjabs: