diff options
| author | Jeffrey Yasskin <jyasskin@gmail.com> | 2009-02-28 19:03:21 (GMT) |
|---|---|---|
| committer | Jeffrey Yasskin <jyasskin@gmail.com> | 2009-02-28 19:03:21 (GMT) |
| commit | 68d68520061a5a4aa3437f8c74ba383b2da50280 (patch) | |
| tree | aaade0afac9b9369b58c5642e2635fa319f61c02 /Lib/opcode.py | |
| parent | de28d6841e60d75ce7644ca527448f73376ec48e (diff) | |
| download | cpython-68d68520061a5a4aa3437f8c74ba383b2da50280.zip cpython-68d68520061a5a4aa3437f8c74ba383b2da50280.tar.gz cpython-68d68520061a5a4aa3437f8c74ba383b2da50280.tar.bz2 | |
Backport r69961 to trunk, replacing JUMP_IF_{TRUE,FALSE} with
POP_JUMP_IF_{TRUE,FALSE} and JUMP_IF_{TRUE,FALSE}_OR_POP. This avoids executing
a POP_TOP on each conditional and sometimes allows the peephole optimizer to
skip a JUMP_ABSOLUTE entirely. It speeds up list comprehensions significantly.
Diffstat (limited to 'Lib/opcode.py')
| -rw-r--r-- | Lib/opcode.py | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Lib/opcode.py b/Lib/opcode.py index d41383b..24d5dcc 100644 --- a/Lib/opcode.py +++ b/Lib/opcode.py @@ -146,9 +146,11 @@ name_op('IMPORT_NAME', 107) # Index in name list name_op('IMPORT_FROM', 108) # Index in name list jrel_op('JUMP_FORWARD', 110) # Number of bytes to skip -jrel_op('JUMP_IF_FALSE', 111) # "" -jrel_op('JUMP_IF_TRUE', 112) # "" -jabs_op('JUMP_ABSOLUTE', 113) # Target byte offset from beginning of code +jabs_op('JUMP_IF_FALSE_OR_POP', 111) # Target byte offset from beginning of code +jabs_op('JUMP_IF_TRUE_OR_POP', 112) # "" +jabs_op('JUMP_ABSOLUTE', 113) # "" +jabs_op('POP_JUMP_IF_FALSE', 114) # "" +jabs_op('POP_JUMP_IF_TRUE', 115) # "" name_op('LOAD_GLOBAL', 116) # Index in name list |