Excellent thoughts, thank you. The question for me is in squeezing more performance out of a mod_perl web application which needs to check for named options in tiny search strings, so perhaps the mundane index implementation is better there. It is faster for me to type regexp matches, so I'll probably use them more, and regexp matches can have /i so I can make them case-insensitive which with index requires lc on both arguments.

I studied Boyer-Moore in my first C Algorithms class under the very demanding Dr. Wong. I'll never forget him, he took points off my code for forgetting to comment, and I learned as much as 50% of my programming craft from him. Nearly failed that class! I was such a geek and I signed up for it as a freshman, when he taught it like a graduate course. I got the impression that he didn't like me...but that probably made me study harder! He also showed me the XOR trick for swapping two registers without an intermediary: 

$a^=$b; $b^=$a; $a^=$b;   # swap a and b

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SSF

In reply to Re^2: is index faster than regexp for fixed text token? by sflitman
in thread is index faster than regexp for fixed text token? by sflitman

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