Hi all!

I found that garbage collection after weakening is extemely slow in some cases. Here is the code:

#!/usr/bin/perl -w
use strict;
use Scalar::Util qw(weaken);

my @data = (1, 2, 3);

print time, " test 0: main start\n";
&gogogo();
print time, " test 3: main end\n";

sub gogogo {
    print time, " test 1: func start\n";
    my @h;
    for (1 .. 200000) {
        my %hash = (data => \@data);
        weaken($hash{data});
        push @h, \%hash;
    }
    print time, " test 2: func end\n";
}

[download]
Timing: 
1273747847 test 0: main start
1273747847 test 1: func start
1273747847 test 2: func end
1273747873 test 3: main end

[download]

I ran it on i686 Linux, perl v.5.8.8, but the same behaviour is within perl 5.12 :-(

It this a bug or what?

Update. Submitted a bug:
http://rt.perl.org/rt3/Public/Bug/Display.html?id=75254
Thanks for your replies!

In reply to Slow GC after Scalar::Util::weaken by jura05

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