Issue #9518 has been updated by Tomoyuki Chikanaga.

Backport changed from 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN to 1.9.3: DONTNEED, 2.0.0: DONTNEED, 2.1: DONE

r45638 was backported into ruby_2_1 at r45818.
according to #9796

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Bug #9518: Objects in large arrays are leaked
https://bugs.ruby-lang.org/issues/9518#change-46517

* Author: Charlie Somerville
* Status: Closed
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin13.0]
* Backport: 1.9.3: DONTNEED, 2.0.0: DONTNEED, 2.1: DONE
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a = [nil] * 131071
loop { a << Object.new; a.pop }
# process RSS stays stable

a = [nil] * 131072
loop { a << Object.new; a.pop }
# process RSS grows quickly and never falls

It seems to be related to this bit of code: https://github.com/github/ruby/blob/2.1/gc.c#L4764-4766



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