No need to really even do that. Use references and have DoIt return the reference: 

my $h = DoIt( $max );
sub DoIt{
        my $limit=shift;
        my $i;
        my $myhash;
        foreach $i (0..$limit){
                $myhash->{$i}=1;
        }
        $func_done = (times)[0];
        $myhash;
}

[download]
That prevents the reference count from being decremented and hence no gc (well at least tell the end of the block containing $h)

-derby

In reply to Re^4: Garbage collection at subroutine return by derby
in thread Garbage collection at subroutine return by tcarmeli

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