Perl slowness
Arie Skliarouk
skliarie at gmail.com
Wed Sep 9 12:09:52 IDT 2009
Try to run the following on both machines:
#!/usr/bin/perl
use Time::HiRes;
($seconds, $microseconds) = Time::HiRes::gettimeofday;
print "Start: $seconds.$microseconds\n";
use DB;
($seconds, $microseconds) = Time::HiRes::gettimeofday;
print "loaded DB: $seconds.$microseconds\n";
Besides "use DB" stick couple more libraries and print the timestamp after
each one.
Test write speed of disks:
time (dd if=/dev/zero of=/tmp/abc bs=1M count=500 && sync)
One of the things the "use DB" does it to load several bytes of entropy from
/dev/random. If the newer machine has much activity, the /dev/random will
not block. Idle machine might require some time to gather entropy. Test the
entropy as follows:
time dd if=/dev/random of=/dev/null bs=100000 count=1
--
Arie
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