>perl -le"use Time::HiRes qw( time ); $stime=time; require IO::Handle; $etime=time; print $etime-$stime;"
0.082003116607666

>perl -le"use Time::HiRes qw( time ); $stime=time; require IO::Handle; $etime=time; print $etime-$stime;"
0.0974130630493164

>perl -le"use Time::HiRes qw( time ); $stime=time; require IO::Handle; $etime=time; print $etime-$stime;"
0.120858192443848