[Python-Dev] talking about performance...
M.-A. Lemburg
mal@lemburg.com
Sun, 18 Jun 2000 23:48:32 +0200
Fredrik Lundh wrote:
>
> amk wrote:
>
> > On Sun, Jun 18, 2000 at 09:06:45PM +0200, Fredrik Lundh wrote:
> > >so in other words, something in unicode land isn't
> > >as efficient as it should...
> >
> > The relevant bit of findstring() in unicodeobject.c:
> >
> > if (direction < 0) {
> > for (; end >= start; end--)
> > if (Py_UNICODE_MATCH(self, end, substring))
> > return end;
> > } else {
> > for (; start <= end; start++)
> > if (Py_UNICODE_MATCH(self, start, substring))
> > return start;
> > }
> >
> > And...
> >
> > #define Py_UNICODE_MATCH(string, offset, substring)\
> > (!memcmp((string)->str + (offset), (substring)->str,\
> > (substring)->length*sizeof(Py_UNICODE)))
>
> heh. it's my own code, of course...
>
> > Proposed patch:
> >
> > Index: unicodeobject.c
>
> MATCH is used in a couple of places; it's probably a better idea
> to change the macro (in Include/unicodeobject.h). MAL?
Right. I'll add Andrew's proposed patch to the macro def.
--
Marc-Andre Lemburg
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