toggle debugging

module MRuby

BENCHMARK_REPEAT = 4

end

$dat_files = []

def bm_files

Dir.glob("#{MRUBY_ROOT}/benchmark/bm_*.rb")

end

def build_config_name

if ENV['MRUBY_CONFIG']
  File.basename(ENV['MRUBY_CONFIG'], '.rb').gsub('build_config_', '')
else
  "build"
end

end

def plot_file

File.join(MRUBY_ROOT, 'benchmark', "#{build_config_name}.png")

end

def plot

opts_file = "#{MRUBY_ROOT}/benchmark/plot.gpl"
opts = File.read(opts_file).each_line.to_a.map(&:strip).join(';')

dat_files = $dat_files.group_by {|f| File.dirname(f).split(File::SEPARATOR)[-1]}

opts += ";set output '#{plot_file}'"

opts += ';plot '

opts += dat_files.keys.map do |data_file|
  %Q['-' u 2:3:4:xtic(1) w hist title columnheader(1)]
end.join(',')
opts += ';'

cmd = %Q{gnuplot -p -e "#{opts}"}

IO.popen(cmd, 'w') do |p|
  dat_files.each do |target_name, bm_files|
    p.puts target_name.gsub('_', '-')
    bm_files.each do |bm_file|
      p.write File.read(bm_file)
    end
    p.puts "e"
  end
end

end

MRuby.each_target do |target|

next if target.name == 'host'
mruby_bin = "#{target.build_dir}/bin/mruby"

bm_files.each do |bm_file|
  bm_name = File.basename bm_file, ".rb"

  dat_dir = File.join('benchmark', build_config_name, target.name)
  dat_file = File.join(dat_dir, "#{bm_name}.dat")
  $dat_files << dat_file

  directory dat_dir

  file dat_file => [bm_file, dat_dir, mruby_bin] do |task|
    print bm_name
    puts "..."

    data = (0...MRuby::BENCHMARK_REPEAT).map do |n|
      str = %x{(time -f "%e %S %U" #{mruby_bin} #{bm_file}) 2>&1 >/dev/null}
      str.split(' ').map(&:to_f)
    end

    File.open(task.name, "w") do |f|
      data = data.map {|_,r,s| (r + s) / 2.0}
      min = data.min
      max = data.max
      avg = data.inject(&:+) / data.size
      f.puts "#{bm_name.gsub('_', '-')} #{avg} #{min} #{max}"
    end
  end
end

end

file plot_file => $dat_files do

plot

end

task :benchmark => plot_file do

plot

end