bench_each_byte.rb

require 'benchmark'
require 'benchmark/ips'

small_file  = File.join(File.dirname(__FILE__), 'small.txt')
medium_file = File.join(File.dirname(__FILE__), 'medium.txt')
large_file  = File.join(File.dirname(__FILE__), 'large.txt')

# Open these before the actual benchmarks so we don't also benchmark
# File.open().
small_handle  = File.open(small_file, 'r')
medium_handle = File.open(medium_file, 'r')
large_handle  = File.open(large_file, 'r')
small_handle2  = File2.open_path(small_file)
medium_handle2  = File2.open_path(medium_file)
large_handle2  = File2.open_path(large_file)
small_handle3  = File3.open_path(small_file)


#small_handle2.each_byte { |byte| p byte }
#exit
#small_handle3.each_byte { |byte| p byte }
#exit

Benchmark.ips do |x|
  x.report "File#each_byte with a small file" do
    small_handle.each_byte {}
    small_handle.rewind
  end

  x.report "File2#each_byte with a small file" do
    small_handle2.each_byte {}
    small_handle2.rewind
  end

  x.report "File3#each_byte with a small file" do
    small_handle3.each_byte {}
    small_handle3.rewind
  end

#  x.report "File#each_byte with a medium file" do
#    medium_handle.each_byte {}
#    medium_handle.rewind
#  end
#
#  x.report "File2#each_byte with a medium file" do
#    medium_handle2.each_byte {}
#    medium_handle2.rewind
#  end
#
#  x.report "File#each_byte with a large file" do
#    large_handle.each_byte {}
#    large_handle.rewind
#  end
#
#  x.report "File2#each_byte with a large file" do
#    large_handle2.each_byte {}
#    large_handle2.rewind
#  end
end

gistfile1.txt

Charless-Mac-Pro:rubinius-benchmark cremes$ ./bin/benchmark core/file/bench_each_byte.rb
=== rbx ===
File#each_byte with a small file
                           96.7 (±1.0%) i/s -        488 in   5.046986s (cycle=8)
File2#each_byte with a small file
                       767145.3 (±2.7%) i/s -    3855628 in   5.030246s (cycle=41909)
File3#each_byte with a small file
                       174259.2 (±3.6%) i/s -     880100 in   5.057088s (cycle=16925)