Hi John FENDER. It seems like you might have given up too early, before the cavalry arrived. See Re^2: How to optimize a regex on a large file read line by line ?. Looks like both are even faster than the grep+wc solution, though this would need to be confirmed on your machine.

In reply to Re^4: How to optimize a regex on a large file read line by line ? by Anonymous Monk
in thread How to optimize a regex on a large file read line by line ? by John FENDER

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