require 'benchmark'

# Benchmarks for IO/File
#
#                           user     system      total        real
# reference             0.000000   0.000000   0.000000 (  0.001515)
# IO.open(0)            0.170000   0.020000   0.190000 (  0.193146)
# IO.open(2)            0.470000   0.020000   0.490000 (  0.487771)
# File.open             0.820000   0.110000   0.930000 (  0.930175)
#
Benchmark.bm(20) do |x|
  n = 10000

  x.report("reference") do
    n.times { $stdout }
  end

  x.report("IO.open(0)") do
    n.times { IO.open(1) }
  end

  x.report("IO.open(1)") do
    n.times { IO.open(1) }
  end

  x.report("File.open") do
    n.times { File.open(__FILE__) {} }
  end
end