On 19-1-1 21:39, Stefan Behnel wrote:
> I wouldn't be surprised if the slowest part here was the isinstance()
> check. Maybe the RegexFlag class could implement "__hash__()" as "return
> hash(self.value)" ?
Apply this patch:
def _compile(pattern, flags):
# internal: compile pattern
- if isinstance(flags, RegexFlag):
- flags = flags.value
+ try:
+ flags = int(flags)
+ except:
+ pass
try:
return _cache[type(pattern), pattern, flags]
except KeyError:
Then run this benchmark on my Raspberry Pi 3B:
import perf
runner = perf.Runner()
runner.timeit(name="compile_re",
stmt="re.compile(b'[^0-9A-F]')",
setup="import re")
Mean +- std dev: [a] 7.71 us +- 0.09 us -> [b] 6.74 us +- 0.10 us: 1.14x
faster (-13%)
Looks great.
_______________________________________________
Python-ideas mailing list
Python-ideas@python.org
https://mail.python.org/mailman/listinfo/python-ideas
Code of Conduct: http://python.org/psf/codeofconduct/
