Mercurial > cpython-lru_cache-weakref

diff Lib/opcode.py @ 44334:07aa19170a67 legacy-trunk

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Speed-up dictionary constructor by about 10%. New opcode, STORE_MAP saves the compiler from awkward stack manipulations and specializes for dicts using PyDict_SetItem instead of PyObject_SetItem. Old disassembly: 0 BUILD_MAP 0 3 DUP_TOP 4 LOAD_CONST 1 (1) 7 ROT_TWO 8 LOAD_CONST 2 ('x') 11 STORE_SUBSCR 12 DUP_TOP 13 LOAD_CONST 3 (2) 16 ROT_TWO 17 LOAD_CONST 4 ('y') 20 STORE_SUBSCR New disassembly: 0 BUILD_MAP 0 3 LOAD_CONST 1 (1) 6 LOAD_CONST 2 ('x') 9 STORE_MAP 10 LOAD_CONST 3 (2) 13 LOAD_CONST 4 ('y') 16 STORE_MAP
author Raymond Hettinger <python@rcn.com>
date Tue, 18 Dec 2007 18:26:18 +0000
parents b6d2f6fd3e11
children 7ac117b3be37
line wrap: on
line diff
--- a/Lib/opcode.py	Tue Dec 18 09:12:10 2007 +0000
+++ b/Lib/opcode.py	Tue Dec 18 18:26:18 2007 +0000
@@ -85,6 +85,7 @@
 def_op('DELETE_SLICE+2', 52)
 def_op('DELETE_SLICE+3', 53)
 
+def_op('STORE_MAP', 54)
 def_op('INPLACE_ADD', 55)
 def_op('INPLACE_SUBTRACT', 56)
 def_op('INPLACE_MULTIPLY', 57)