There's no point trying to optimize your code if you're not sure what your data looks like. However index will be faster than a regex if you're only looking for a fixed string.

As other people have recommended, profile your code and find out where the time is going.

In reply to Re^3: How to optimize a regex on a large file read line by line ? by RichardK
in thread How to optimize a regex on a large file read line by line ? by John FENDER

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