From: Roger Pack <redmine@...>
Date: 2009-06-17T01:24:43+09:00
Subject: [ruby-core:23875] [Bug #1392] Object#extend leaks memory on Ruby 1.9.1

Issue #1392 has been updated by Roger Pack.


I think you can tell if it was a leak by running a loop

  loop do
    s = {}
    s.extend BetterHash if @extend
  end

If this eats up all memory in the system then it's a leak. [on mine it stays constant at 4MB].
That doesn't mean to say there's no bugs in there, though--it may be the case that you're using up the entire freelist each time, without ever passing the malloc_limit, which means that your heap total size will get bigger and bigger and bigger...not sure though.
Compiling 1.9 with the GC stats turned on might help.
Cheers!
-=r
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