Michael Hudson wrote:
> > Fredrik's PySequence_Fast_* APIs look interesting, BTW. Should be
> > used more often :-)
>
> Yes. But they're pretty new, aren't they? I find them a bit
> unsatisfactory that it's not possible to hoist the type check out of
> the inner loop.
if you can figure out a way to do that with C macros,
I'd love to see it...
on the other hand, PySequence_Fast guarantees that the
returned object is either a list or a tuple, so you can easily
move the test outside the loop yourself:
if (PyTuple_Check(seq))
for (...)
item = PyTuple_GET_ITEM(seq, i)
...
else
for (...)
item = PyList_GET_ITEM(seq, i)
...
> Still, it seems my PII's branch predictor nails that one... (i.e. changing
> it so that it didn't check inside the loop made naff-all difference to the
> running time).
yeah, the type isn't likely to change inside the loop...
</F>
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