Re^3: How to speed up multiple regex in a loop for a big data?

You're correct with the \b word boundaries. The problem case I am thinking of is the following renaming setup:

%mapper = (
    foo => 'zap',
    zap => 'foo',
)
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Here, foo will be replaced by "zap" in your loop and then again by "foo". But if that can't happen, all you'll gain with the large regex is speed ;)

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Re^4: How to speed up multiple regex in a loop for a big data? by MonkInPleasanton (Initiate) on May 25, 2006 at 14:28 UTC
Theritically, you are right. However, new names will have suffixes and prefixes around old variable names in my case. It won't happen. Thanks though.	[reply]