From: Farrel Lifson <farrel.lifson@...>
Date: 2008-11-09T07:10:26+09:00
Subject: Memory implications for persistent Proc objects

What are the memory implications for keeping a Proc/closure around
especially those that are defined in a global scope? Is Ruby clever
enough not to keep objects in the Proc closure that are never
referenced in that closure? I'm worried where I have the following
scenario

big_object = BigObjectNeedsLotsOfRAM.new
my_proc = Proc.new { ... } # big_object not referenced in my_proc
big_object = nil
my_proc.call

Will the memory allocated to big_object remain in use because it was
alive when my_proc was created despite it not being referenced or used
in my_proc?

Farrel