[innocenat]

I agree that cycle collector is pointless waste of time. Most script runs short enough that the memory leak doesn't really matter.

But for long running script, it's either cycle collector, or add support for weak reference. But IMO, due to how reference are stored in PHP, and to my limited knowledge of PHP core, I am quite sure cycle collector are more beneficial in both developer time and usefulness. (Not every programmers know how to manage reference cycle)