profile rb-fchange

Gemfile

source :rubygems

gem 'ruby-prof', :git => "https://github.com/wycats/ruby-prof.git"
# gem 'perftools.rb', :git => 'git://github.com/tmm1/perftools.rb.git'

gem 'rb-fchange'
gem 'listen'

test.rb

require 'ruby-prof'
require 'fileutils'
require 'listen'

def write_results(result, type)
  FileUtils.mkdir("results") unless File.directory?("results")

  printer = RubyProf::FlatPrinter.new(result)
  printer.print(File.new("results/result-#{type}.txt", "w"))

  printer = RubyProf::GraphHtmlPrinter.new(result)
  printer.print(File.new("results/result-#{type}.html", "w"))

  printer = RubyProf::DotPrinter.new(result)
  printer.print(File.new("results/result-#{type}.dot", "w"))
end

def run_test(listener)
  t = Thread.new { listener.start }
  sleep(0.5)
  RubyProf.start
  FileUtils.touch 'test'
  FileUtils.rm 'test'
  Thread.kill(t)
  RubyProf.stop
end

#####################
# Without FChange
#####################

puts "Profiling without fchange"
result = run_test(Listen.to(Dir.pwd, :force_polling => true))
write_results(result, "no-fchange")

#####################
# With FChange
#####################

puts "Profiling with fchange"
result = run_test(Listen.to(Dir.pwd))
write_results(result, "fchange")

puts "Finished profiling"

test2.rb

require 'fileutils'
require 'listen'

require 'perftools'

#####################
# Without FChange
#####################

puts "Profiling without fchange"

listener = Listen.to(Dir.pwd, :force_polling => true)
t = Thread.new { listener.start }
sleep(0.5)
PerfTools::CpuProfiler.start("result/no-fchange")
FileUtils.touch 'test'
FileUtils.rm 'test'
PerfTools::CpuProfiler.stop
Thread.kill(t)

#####################
# With FChange
#####################

puts "Profiling with fchange"

listener = Listen.to(Dir.pwd)
t = Thread.new { listener.start }
sleep(0.5)
PerfTools::CpuProfiler.start("result/fchange")
FileUtils.touch 'test'
FileUtils.rm 'test'
PerfTools::CpuProfiler.stop
Thread.kill(t)

puts "Finished profiling"