bench reading text file

r.rb

require_relative 'utils'
filename="x.txt"
content=<<EEND
=============== First line
aaaaaaaaaaaa
bbbbbbbbbbbb
111111111111
Aéàèû

--------------- Fin
EEND
content=content*1024
def echo(e) end

puts "Create file a big file"
File.open(filename,"w") { |f| 1000.times { f.print(content) } }
puts "File size=#{File.size(filename)/1024} KB"

puts "Read file line by line"
chrono("  while gets  ") { File.open(filename)    { |f|  while line=f.gets ; echo line.chomp; end } } 
chrono("  f.each_line ") { File.open(filename)    { |f|  f.each_line {|line| echo line } } }
chrono("  File.foreach") { File.foreach(filename) {|line|  echo line } }
chrono("  IO.foreach  ") { IO.foreach(filename)   { |line| echo line } }

chrono("  File.readlines ") { File.readlines(filename).each { |line| echo line } }
chrono("  File.read.split") { File.read(filename).split(/\r?\n/).each { |line| echo line } }

chrono("  File.readlines ") { File.readlines(filename).each { |line| echo line } }
chrono("  File.read.split") { File.read(filename).split(/\r?\n/).each { |line| echo line } }

puts "Create file a little file"
content=content[0..16000]
File.open(filename,"w") { |f|  f.print(content) }
puts "File size=#{File.size(filename)/1024.0} KB"

puts "Read file line by line"
chrono("  while gets  ",100) { File.open(filename)    { |f|  while line=f.gets ; echo line.chomp; end } } 
chrono("  f.each_line ",100) { File.open(filename)    { |f|  f.each_line {|line| echo line } } }
chrono("  File.foreach",100) { File.foreach(filename) {|line|  echo line } }
chrono("  IO.foreach  ",100) { IO.foreach(filename)   { |line| echo line } }

chrono("  File.readlines ",100) { File.readlines(filename).each { |line| echo line } }
chrono("  File.read.split",100) { File.read(filename).split(/\r?\n/).each { |line| echo line } }


p "d"
File.delete(filename)