Using strict and warnings doesn't cost that much in terms of startup time.
The load time of strict.pm or warnings.pm isn't very interesting. To get an idea of the impact of using strict.pm, one should measure the load time of a (large) program and/or module with, and without using strict. I still expect to difference to be tiny. The impact of using warnings.pm is harder to measure, due to its runtime effects.

In reply to Re: Benchmarks for module compilation time by Anonymous Monk
in thread Benchmarks for module compilation time by itub

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