[issue19380] Optimize parsing of regular expressions

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

### regex_compile ###
Min: 2.897919 -> 2.577488: 1.12x faster
Avg: 3.066306 -> 2.681966: 1.14x faster
Significant (t=26.77)
Stddev: 0.08789 -> 0.05085: 1.7283x smaller

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19380>
_______________________________________