Perl 5.10 IIRC was one of the less optimised Perl versions. I think some benchmarks put it 20-50% slower than 5.8. 5.12 and 5.14 improved the speed much. (Sorry, no sources to back this up at this time.)

In reply to Re^3: Much slower DBI on RHEL6 by Anonymous Monk
in thread Much slower DBI on RHEL6 by MPM

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