benchmark unix versus bash vol1

gistfile1.rb

require 'benchmark'

puts <<desc
Read the String
Ruby: File.read
Unix: cat

desc
Benchmark.bm do |bmark|
  bmark.report(:ruby) do
    100.times do
      result = File.read("/usr/share/dict/words")
    end
  end
  bmark.report(:unix) do
    100.times do
      result = `cat "/usr/share/dict/words"`
    end
  end
end

puts <<desc
First Element
Ruby1: File.read().split()[0]
Ruby2: File.read().scan(/\A^[a-zA-Z]*$/)[0]
Ruby2: File.read().scan(/^[a-zA-Z]*$/)[0]
Unix: sed 1q < /usr/share/dict/words

desc
Benchmark.bm do |bmark|
  bmark.report(:ruby1) do
    100.times do
      result = File.read("/usr/share/dict/words").split("\n")[0]
    end
  end
  bmark.report(:ruby2) do
    100.times do
      result = File.read("/usr/share/dict/words").scan(/\A^[a-zA-Z]*$/)[0]
    end
  end
  bmark.report(:ruby3) do
    100.times do
      result = File.read("/usr/share/dict/words").scan(/^[a-zA-Z]*$/)[0]
    end
  end
  bmark.report(:unix) do
    100.times do
      result = `sed 1q < /usr/share/dict/words`
    end
  end
end

puts <<desc
First Element
Ruby1: File.read().split().select(){|i| i =~ /sass/}
Ruby2: File.read().scan(/sass/)
Unix1: grep sass /usr/share/dict/words
Unix2: grep sass /usr/share/dict/words + Ruby split()

desc
Benchmark.bm do |bmark|
  bmark.report(:ruby1) do
    100.times do
      result = File.read("/usr/share/dict/words").split("\n").select{|i| i =~ /sass/ }
    end
  end
  bmark.report(:ruby2) do
    100.times do
      result = File.read("/usr/share/dict/words").scan(/sass/)
    end
  end
  bmark.report(:unix1) do
    100.times do
      result = `grep sass /usr/share/dict/words`
    end
  end
  bmark.report(:unix2) do
    100.times do
      result = `grep sass /usr/share/dict/words`.split("\n")
    end
  end
end