benchmarking system vs File

gistfile1.rb

require 'rubygems'
require 'benchmark'
require 'fileutils'

iterations = 1000

Benchmark.bm do |bm|
  puts "write to a file using backticks"
  bm.report do
    iterations.times do
      `echo testtesttesttest >> test1.file`
    end
  end

  puts "write to a file using file method"
  bm.report do
    iterations.times do
      File.open('test2.file', 'a'){|f| f.puts('testtesttesttest')}
    end
  end

  puts "create and remove a file using backticks"
  bm.report do
    iterations.times do
      `touch test3.file`
      `rm -f test3.file`
    end
  end

  puts "create and remove a file using file_utils"
  bm.report do
    iterations.times do
      FileUtils.touch('test4.file')
      File.delete('test4.file')
    end
  end

  puts "move a file using backticks"
  bm.report do
    iterations.times do
      `mv test1.file test5.file`
      `mv test5.file test1.file`
    end
  end

  puts "move a file using file"
  bm.report do
    iterations.times do
      FileUtils.move('test2.file', 'test6.file')
      FileUtils.move('test6.file', 'test2.file')
    end
  end
end