Performance of `re-search-backward' vs `re-search-forward'

[Marcin Borkowski]

Hi all,

I seem to (very vaguely) remember reading that `re-search-backward' is
significantly slower than `re-search-forward'.  However, I can't find
anything about it in the docstring (nor in the Elisp reference) now.  Am
I even correct?  If so, is it documented anywhere?  (It would be fine
with me if it weren't, this is not to say that the docs are buggy
without mentioning it, I'm just curious.)

TIA,

-- 
Marcin Borkowski
http://mbork.pl