From: watson1978@...
Date: 2017-04-12T12:59:25+00:00
Subject: [ruby-core:80665] [Ruby trunk Bug#13426] Improve performance of implicit type conversion using #to_r

Issue #13426 has been reported by watson1978 (Shizuo Fujita).

----------------------------------------
Bug #13426: Improve performance of implicit type conversion using #to_r
https://bugs.ruby-lang.org/issues/13426

* Author: watson1978 (Shizuo Fujita)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
This patch will improve performance in implicit type conversion using #to_r
At least, Integer#quo will be faster around 40%.
And, this will improve some Time methods which calling quov() internally.

### Before
~~~
                   user     system      total        real
Integer#quo    2.030000   0.010000   2.040000 (  2.031988)
Time#subsec    2.410000   0.000000   2.410000 (  2.412172)
~~~

### After
~~~
                  user     system      total        real
Integer#quo   1.460000   0.000000   1.460000 (  1.463345)
Time#subsec   2.050000   0.010000   2.060000 (  2.056003)
~~~

### Test code
~~~
require 'benchmark'

Benchmark.bmbm do |x|
  x.report "Integer#quo" do
    5000000.times do
      42.quo(3)
    end
  end

  x.report "Time#subsec" do
    t = Time.now
    4000000.times do
      t.subsec
    end
  end

end
~~~

### Patch
https://github.com/ruby/ruby/pull/1582



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