From: watson1978@...
Date: 2017-03-22T15:55:51+00:00
Subject: [ruby-dev:50034] [Ruby trunk Bug#13354] Improve Time#<=> performance

Issue #13354 has been reported by watson1978 (Shizuo Fujita).

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Bug #13354: Improve Time#<=> performance
https://bugs.ruby-lang.org/issues/13354

* Author: watson1978 (Shizuo Fujita)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
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Time#<=> will be faster around 60%.
If internal values would have Fixnum,
optimized function improves performance.
(https://github.com/ruby/ruby/blob/9b69e9fafc329aaa540d5adeb55124f020abfe3c/time.c#L57-L67)

### Before
~~~
       user     system      total        real
   1.410000   0.000000   1.410000 (  1.407848)
~~~

### After
~~~
       user     system      total        real
   0.880000   0.000000   0.880000 (  0.886662)
~~~

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

Benchmark.bmbm do |x|

  x.report do
    t1 = Time.now
    t2 = Time.now
    10000000.times do
      t1 <=> t2
    end
  end

end
~~~

### Patch
The patch is in https://github.com/ruby/ruby/pull/1546



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