bug#18522: 24.4.50; mapcar is very slow

[Lars Ingebrigtsen]

I've now rewritten that function to not use all those regexp and stuff,
and I'm pleased to say that

(benchmark-run 1
  (dotimes (i 100000)
    (parse-time-string "Fri, 13 Feb 2015 14:40:02 +0000")))

went from approx 9 seconds on my computer to 3.5 seconds (in fresh -Q
Emacsen).  :-)  (I haven't measured whether that's because it's creating
less garbage or just because it's ... faster.)

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no