Run this code and watch the memory use grow:

use List::MoreUtils qw(natatime);

my $count = 0;
while (1) {
    my @rows = ("...") x 100;
    my $it = natatime(10,@rows);
    while(my @chunk = $it->()) {
        $count += @chunk;
        if ($count % 1000 == 0) {
            warn "COUNT : $count\n";
        }
    }
}
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I haven't dug any deeper than this, so I'm not sure if it's something in List::MoreUtils XS code or a side-effect of using a closure for the iterator, or what. I'm also going to send this to the maintainer, so no need to remind me!

UPDATE: It would seem to be an XS bug - setting the environment var LIST_MOREUTILS_PP=1 makes it go away.

UPDATE 2: Corion asked, so I'll tell you - this is List::MoreUtils v0.22 on Perl v5.8.8. Oh, and the maintainer's email address doesn't work. Anybody want to take over and fix this?

-sam