unset, memory_limit

Hello, While reading the bugs reports I came up with something I did not expect with the bug 27714. Maybe I have had too much ram in the past years ;) So this is bug is bogus, and this is the expected behavior. Unset (or set the var null) frees the memory only if memory_limit is enabled and not equal to -1 (unlimited) for both php5 and php4. Why? That's sound a bit silly to me, as that makes the related functions useless and does not allow anyone to free a huge variable when he does not need it anymore. My main problem is when I use CLI or gtk scripts. Or is there any "performance" issues there? At least it's a documentation bug as nothing in the manual described this behavior. pierre