From: Paul Battley <pbattley@...>
Date: 2006-07-29T08:25:57+09:00
Subject: Re: Finding "\" in a string

On 29/07/06, Logan Capaldo <logancapaldo@gmail.com> wrote:
> This is why when I need to gsub backslashes I use a block:
>
> gsub(%r{\}) { '\\' }

That's much easier, but significantly slower:

s = "\\foo" * 1000000

t0 = Time.now
s.gsub("\\", "\\\\\\")
p(Time.now - t0) # 1.394492

t0 = Time.now
s.gsub("\\"){ "\\\\" }
p(Time.now - t0) # 2.863728

If you are dealing with very long strings, it's probably worth the
effort of ciphering the backslashes.

Paul.