V8 is able to compile PCREs directly into efficient machine code (in some cases at least), CPython is not.
See: http://blog.chromium.org/2009/02/irregexp-google-chromes-new...
Re:Yahoo Mail moving to React
by ChrisAntaki on Wednesday November 26, 2014 @01:00PM
(#8663640)
Thanks for the insight!
What were your thoughts on the regex-dna benchmark?