in reply to Referncing a local array outside
The suggestions that you use my, not local, are completely correct and should be followed. However, in the interest of completely answering your questions, I wanted to add that it is my understanding that "early" garbage collection of your localized vars would not happen. Localized variables are gc'd like other variables - if outstanding references exist, such variables are not eligible for gc.
BTW, I am writing this without reference to any particular documentation, just my experience of dynamic scoping. If my understanding here is incorrect, I will be shocked and would much appreciate learning the error of my ways from those that know better (part of the reason I post this).