I wasn't sure if BrowserUk was being sarcastic or not...OK, I've decided he was playing straight.

Yes, a quick check of 5.8.0 shows that this takes a long time to finish:

foreach ( glob( "{a,b,c,d}" x 10 ) )
{
    print "$_\n";
    last;
}
[download]

while this finishes immediately:

foreach ( 'aaaaaaaaaa'..'dddddddddd' )
{
    print "$_\n";
    last;
}
[download]

I'll leave it to OMAR to check the memory use :)

-QM
--
Quantum Mechanics: The dreams stuff is made of