Issue #9518 has been updated by Charlie Somerville.


Oops, the markdown rendering messed up the code I pasted above.

    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

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Bug #9518: Objects in large arrays are leaked
https://bugs.ruby-lang.org/issues/9518#change-45121

* Author: Charlie Somerville
* Status: Open
* 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: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
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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