Mercurial > cpython-lru_cache-weakref

annotate Python/getplatform.c @ 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 6f6f965c5e2d
children
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3621
f158edccc72c grand renaming; added copyright to some files
Guido van Rossum <guido@python.org>
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1
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2 #include "Python.h"
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3
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4 #ifndef PLATFORM
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5 #define PLATFORM "unknown"
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6 #endif
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7
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728a083242a2 Make it return a _const_ char*.
Guido van Rossum <guido@python.org>
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8 const char *
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
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9 Py_GetPlatform(void)
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10 {
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11 return PLATFORM;
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12 }