A workaround is to add a layer in between. 
#!/usr/bin/perl -w
use strict;
use Scalar::Util qw(weaken);

my @data = (1, 2, 3);
weaken( my $indirection = \@data );

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 => $indirection);
        push @h, \%hash;
    }
    print time, " test 2: func end\n";
}

[download]
You'd have to change 
my $data = $h[0]{data};

[download]
to 
my $data = ${ $h[0]{data} };

[download]
if you use this workaround.

In reply to Re: Slow GC after Scalar::Util::weaken by ikegami
in thread Slow GC after Scalar::Util::weaken by jura05

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