From: Rick DeNatale <rick.denatale@...>
Date: 2006-09-05T10:05:37+09:00
Subject: Re: Compiling Regexp only once

On 9/4/06, Eric Hodel <drbrain@segment7.net> wrote:
> On Sep 4, 2006, at 4:29 PM, Rick DeNatale wrote:
>
> > On 9/4/06, Robert Klemme <shortcutter@googlemail.com> wrote:
> >
> >> Note though that it's usually faster to have a regexp in line.  So in
> >> your case you might have a method that does the line parsing (or
> >> multiple line parsing) and that's where you can put the inline regexp
> >> for max efficiency.
> >
> > Robert,
> >
> > I'm not sure what you mean by inline, do you mean a regexp literal
> > like
> > /[ABC]/ vs. RegEx.new('/[ABC]/')  if so that's not clear.
> >
> > See my benchmarks on the thread about "Ordered contrast for String or
> > Array," where changing a literal /./ to a constant set to
> > RegEx.new('/./') caused a 200 fold performance increase.
>
> Those aren't the same regular expression.  I expect that your
> benchmark is flawed.

Oops, right you are.

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/