From: "HParker (Adam Hess) via ruby-core" <ruby-core@...>
Date: 2023-09-23T19:48:06+00:00
Subject: [ruby-core:114889] [Ruby master Bug#19901] Module clone memory leak

Issue #19901 has been reported by HParker (Adam Hess).

----------------------------------------
Bug #19901: Module clone memory leak
https://bugs.ruby-lang.org/issues/19901

* Author: HParker (Adam Hess)
* Status: Open
* Priority: Normal
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
GitHub PR: https://github.com/ruby/ruby/pull/8503

reproduction:

```ruby
m = Module.new

20.times do
  100_000.times do
    m.clone
  end

  puts `ps -o rss= -p #{$$}`
end
```

before:

```
21544
24708
27860
31024
33928
37360
40264
43432
46600
49768
52936
55840
59008
62176
65344
68512
71680
74584
77752
80920
```

after:

```
18808
18808
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
18872
```



-- 
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