On Jun 10, 7:01 am, Alexey Nezhdanov <[email protected]> wrote:
> I get these results (best timing):
> try-variant: 10.24s
> regex: 9.58s
> So on my laptop try:except: function loses about 5% to regex - probably it
> depends on hardware/OS.
Interesting, which python/platform are you using ?
> And as Massimo pointed out - we don't really check for an int - we check for
> valid id. Function should be remamed, yes.
Right, it's more like is_convertible_to_int. Now that we are more
clear about what we're looking for, it sounds exactly like
string.isdigit() to me.
b...@black:/tmp$ python -m timeit "s=[str(i) for i in range(10000)]"
"import re" "integer_pat=re.compile('[+-]?[0-9]{1,15}$')"
"is_integer=integer_pat.match"
100 loops, best of 3: 3.64 msec per loop
b...@black:/tmp$ python -m timeit "s=[str(i) for i in range(10000)]"
"import re" "integer_pat=re.compile('[+-]?[0-9]{1,15}$')"
"is_integer=integer_pat.match" "for i in s:" " is_integer(i)"
100 loops, best of 3: 9.87 msec per loop
b...@black:/tmp$ python -m timeit "s=[str(i) for i in range(10000)]"
"for i in s:" " i.isdigit()"
100 loops, best of 3: 4.63 msec per loop
Which gives a 6.2x (!) faster result.
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