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  1. or download this
    $ENV{PERL_DPROF_OUT_FILE_NAME} = "foo${$}.out";
  2. or download this
    #!/usr/bin/perl  -d:DProf

{
...

print 'In Parent', $/ or die $!;
sleep 10;
  3. or download this
    #!/usr/bin/perl

print 'In Child',$/ or die $!;
sleep 10;