From: "rubikitch ." <redmine@...>
Date: 2008-11-10T05:41:10+09:00
Subject: [ruby-dev:37051] [Bug #736] Range#include? 	が遅い

Bug #736: Range#include? が遅い
http://redmine.ruby-lang.org/issues/show/736

起票者: rubikitch .
ステータス: Open, 優先度: Normal

Ruby 1.9でRange#include?がものすごい遅いようです。

require 'benchmark'
RUBY_VERSION                    # => "1.8.7"
Benchmark.bmbm(10) do |b|
  n = 100
  b.report("include") { n.times{ ("an".."ruby").include? "elf" }}
  b.report("between") { n.times{ "elf".between?("an","ruby") }}
end
# >> Rehearsal ---------------------------------------------
# >> include     0.000000   0.000000   0.000000 (  0.000278)
# >> between     0.000000   0.000000   0.000000 (  0.000113)
# >> ------------------------------------ total: 0.000000sec
# >> 
# >>                 user     system      total        real
# >> include     0.000000   0.000000   0.000000 (  0.000233)
# >> between     0.000000   0.000000   0.000000 (  0.000113)


require 'benchmark'
RUBY_VERSION                    # => "1.9.0"
Benchmark.bmbm(10) do |b|
  n = 100
  b.report("include") { n.times{ ("an".."ruby").include? "elf" }}
  b.report("between") { n.times{ "elf".between?("an","ruby") }}
end
# >> Rehearsal ---------------------------------------------
# >> include     0.420000   0.000000   0.420000 (  0.417621)
# >> between     0.000000   0.000000   0.000000 (  0.000116)
# >> ------------------------------------ total: 0.420000sec
# >> 
# >>                 user     system      total        real
# >> include     0.420000   0.000000   0.420000 (  0.422576)
# >> between     0.000000   0.000000   0.000000 (  0.000120)


----------------------------------------
http://redmine.ruby-lang.org