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Re: Re: Does undef free ram?

by dada (Chaplain)
on Jul 18, 2002 at 10:26 UTC ( #182746=note: print w/ replies, xml ) Need Help??


in reply to Re: Does undef free ram?
in thread Does undef free ram?

and here's the same script under Win32 (NT 4.0/2000/XP):

use Win32::API 0.20; my $GCP = new Win32::API( "kernel32", "GetCurrentProcess", "", "N" ) or die "Can't import API: $^E"; my $GPMI = new Win32::API( "psapi", "GetProcessMemoryInfo", "NPN", "N" ) or die "Can't import API: $^E"; our @test; print "nothing : Size = ".size()."\n"; push @test, rand for (1..100000); print "push : Size = ".size()."\n"; #undef @test; @test = (); print "deleted : Size = ".size()."\n"; sub size { my $handle = $GCP->Call(); my $m = pack("LLLLLLLLLL", 16*10, 0 x 10); $r = $GPMI->Call( $handle, $m, 160 ); my $pwss = (unpack("LLLLLLLLLL", $m))[2]; return int($pwss/1024)." kB"; }
interestingly enough, the figures are different here: if I use @test = ();, output is:
nothing : Size = 2252 kB push : Size = 4776 kB deleted : Size = 4776 kB
and with undef @test;
nothing : Size = 2252 kB push : Size = 4776 kB deleted : Size = 4776 kB
both solutions don't free any memory at all.

cheers,
Aldo

__END__ $_=q,just perl,,s, , another ,,s,$, hacker,,print;


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