I suggest that even before going to measure the bottlenecks, the OP needs to define what is goal is. If the process is taking 10 seconds and he wants it to run in two, then mere tweaking may not be enough.

xoxo,
Andy

In reply to Re^2: Pattern matching across two files, Need something better than grep -f! by petdance
in thread Pattern matching across two files, Need something better than grep -f! by anasuya

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