Front page | perl.perl5.porters |
Postings from January 2012
On Sat, Jan 28, 2012 at 5:34 PM, Alexandr Gomoliako
<perlbug-followup@perl.org> wrote:
> So, basically using another scalar that holds a sub inside
> another one causes it to leak a lot of memory.
> Tested on 5.8.9, 5.12.4 and 5.14.2:
>
> sub leak {
> my ($foo, $bar);
>
> $foo = sub { &$bar };
> $bar = sub { "$foo" };
>
> return;
> }
>
>
> # test
>
> sub psprint { print `ps -p$$ -ocommand,vsize` }
> psprint;
> for (1..20000) {
> leak();
> }
> psprint;
This is called a circular reference, and this kind of leaking is a
well known consequence of reference counting. If you want this not to
happen, try weakening one of the references.
Leon
Thread Previous
|
Thread Next