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SF Patch #103250, by pj99: Optimize a strspn() out of startup. 

Minor startup speedup: avoid a call to strspn().
This commit is contained in:
Guido van Rossum 2001-01-19 00:24:06 +00:00
parent 2312024eb7
commit fc5ce61abd
1 changed files with 21 additions and 4 deletions
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25
Python/compile.c
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@ -164,6 +164,26 @@ PyTypeObject PyCode_Type = {
#define NAME_CHARS \
"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
/* all_name_chars(s): true iff all chars in s are valid NAME_CHARS */
static int
all_name_chars(unsigned char *s)
{
static char ok_name_char[256];
static unsigned char *name_chars = NAME_CHARS;
if (ok_name_char[*name_chars] == 0) {
unsigned char *p;
for (p = name_chars; *p; p++)
ok_name_char[*p] = 1;
}
while (*s) {
if (ok_name_char[*s++] == 0)
return 0;
}
return 1;
}
PyCodeObject *
PyCode_New(int argcount, int nlocals, int stacksize, int flags,
PyObject *code, PyObject *consts, PyObject *names,
@ -214,12 +234,9 @@ PyCode_New(int argcount, int nlocals, int stacksize, int flags,
/* Intern selected string constants */
for (i = PyTuple_Size(consts); --i >= 0; ) {
PyObject *v = PyTuple_GetItem(consts, i);
char *p;
if (!PyString_Check(v))
continue;
p = PyString_AsString(v);
if (strspn(p, NAME_CHARS)
!= (size_t)PyString_Size(v))
if (!all_name_chars((unsigned char *)PyString_AsString(v)))
continue;
PyString_InternInPlace(&PyTuple_GET_ITEM(consts, i));
}