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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
Python/opcode_metadata.h
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@ -205,6 +205,8 @@ _PyOpcode_num_popped(int opcode, int oparg, bool jump) {
return 1;
case MAP_ADD:
return 2;
case LOAD_SUPER_ATTR:
return 3;
case LOAD_ATTR:
return 1;
case LOAD_ATTR_INSTANCE_VALUE:
@ -589,6 +591,8 @@ _PyOpcode_num_pushed(int opcode, int oparg, bool jump) {
return 0;
case MAP_ADD:
return 0;
case LOAD_SUPER_ATTR:
return ((oparg & 1) ? 1 : 0) + 1;
case LOAD_ATTR:
return ((oparg & 1) ? 1 : 0) + 1;
case LOAD_ATTR_INSTANCE_VALUE:
@ -879,6 +883,7 @@ const struct opcode_metadata _PyOpcode_opcode_metadata[256] = {
[DICT_UPDATE] = { true, INSTR_FMT_IB },
[DICT_MERGE] = { true, INSTR_FMT_IB },
[MAP_ADD] = { true, INSTR_FMT_IB },
[LOAD_SUPER_ATTR] = { true, INSTR_FMT_IB },
[LOAD_ATTR] = { true, INSTR_FMT_IBC00000000 },
[LOAD_ATTR_INSTANCE_VALUE] = { true, INSTR_FMT_IBC00000000 },
[LOAD_ATTR_MODULE] = { true, INSTR_FMT_IBC00000000 },