Ruby » Ruby master

Improve Time#+ & Time#- performance

• time.c (wadd): use internal addv() function to calculate internal value in
  Time object. On 64-bit machine, Time object might have Fixnum object
  internally by default and addv() can calculate Fixnum objects directly.

• time.c (wsub): use internal subv() function due the same reason in above.

  Time#+ & Time#- will be faster around 15%.

  [ruby-dev:50036] [Bug #13357] [Fix GH-1547]

Before¶

         user     system      total        real

Time#+ 0.820000 0.000000 0.820000 ( 0.818081)
Time#- 0.810000 0.000000 0.810000 ( 0.813835)

After¶

         user     system      total        real

Time#+ 0.710000 0.000000 0.710000 ( 0.710241)
Time#- 0.710000 0.010000 0.720000 ( 0.714151)

Test code¶

require 'benchmark'

Benchmark.bmbm do |x|

x.report "Time#+" do
t = Time.now
2000000.times do
t + 1
end
end

x.report "Time#-" do
t = Time.now
2000000.times do
t - 1
end
end

end

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58829 b2dd03c8-39d4-4d8f-98ff-823fe69b080e