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| author | Neal Norwitz <nnorwitz@gmail.com> | 2002-12-30 22:29:22 (GMT) |
|---|---|---|
| committer | Neal Norwitz <nnorwitz@gmail.com> | 2002-12-30 22:29:22 (GMT) |
| commit | c91ed400e053dc9f11dd30c84e2bb611999dce50 (patch) | |
| tree | f190a1d4d9d3dbdb7d60afda9f7ea643e4f63b1b /Objects/intobject.c | |
| parent | 83f898c86c5ce68eaddd8f729a67ae2d7d0666ec (diff) | |
| download | cpython-c91ed400e053dc9f11dd30c84e2bb611999dce50.zip cpython-c91ed400e053dc9f11dd30c84e2bb611999dce50.tar.gz cpython-c91ed400e053dc9f11dd30c84e2bb611999dce50.tar.bz2 | |
SF #561244, Micro optimizations
Initialize the small integers and __builtins__ in startup.
This removes some if conditions.
Change XDECREF to DECREF for values which shouldn't be NULL.
Diffstat (limited to 'Objects/intobject.c')
| -rw-r--r-- | Objects/intobject.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/Objects/intobject.c b/Objects/intobject.c index 19d18d3..10587ac 100644 --- a/Objects/intobject.c +++ b/Objects/intobject.c @@ -78,7 +78,7 @@ fill_free_list(void) #define NSMALLPOSINTS 100 #endif #ifndef NSMALLNEGINTS -#define NSMALLNEGINTS 1 +#define NSMALLNEGINTS 5 #endif #if NSMALLNEGINTS + NSMALLPOSINTS > 0 /* References to small integers are saved in this array so that they @@ -97,8 +97,8 @@ PyInt_FromLong(long ival) { register PyIntObject *v; #if NSMALLNEGINTS + NSMALLPOSINTS > 0 - if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS && - (v = small_ints[ival + NSMALLNEGINTS]) != NULL) { + if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) { + v = small_ints[ival + NSMALLNEGINTS]; Py_INCREF(v); #ifdef COUNT_ALLOCS if (ival >= 0) @@ -118,13 +118,6 @@ PyInt_FromLong(long ival) free_list = (PyIntObject *)v->ob_type; PyObject_INIT(v, &PyInt_Type); v->ob_ival = ival; -#if NSMALLNEGINTS + NSMALLPOSINTS > 0 - if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) { - /* save this one for a following allocation */ - Py_INCREF(v); - small_ints[ival + NSMALLNEGINTS] = v; - } -#endif return (PyObject *) v; } @@ -945,6 +938,26 @@ PyTypeObject PyInt_Type = { (freefunc)int_free, /* tp_free */ }; +int +PyInt_Init(void) +{ + PyIntObject *v; + int ival; +#if NSMALLNEGINTS + NSMALLPOSINTS > 0 + for (ival = -NSMALLNEGINTS; ival < NSMALLPOSINTS; ival++) { + if ((free_list = fill_free_list()) == NULL) + return 0; + /* PyObject_New is inlined */ + v = free_list; + free_list = (PyIntObject *)v->ob_type; + PyObject_INIT(v, &PyInt_Type); + v->ob_ival = ival; + small_ints[ival + NSMALLNEGINTS] = v; + } +#endif + return 1; +} + void PyInt_Fini(void) { |