From: knu@...
Date: 2019-08-13T11:19:38+00:00
Subject: [ruby-core:94322] [Ruby master Bug#16026] `Set#count` performance	issues

Issue #16026 has been updated by knu (Akinori MUSHA).


I agree that the `return size if !block_given? && respond_to?(:size)` logic should belong to Enumerable.

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Bug #16026: `Set#count` performance issues
https://bugs.ruby-lang.org/issues/16026#change-80709

* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
* Assignee: knu (Akinori MUSHA)
* Target version: 
* ruby -v: 
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
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`Set#size` is O(1), but `Set#count` is O(N).

I would like to add `alias count size` to `class Set`

Is it okay?



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