mandelbrot.rb

BAILOUT = 16
MAX_ITERATIONS = 1000

class Bench1

  def initialize
    puts "Rendering..."
    for y in -39..39
      print "\n"
      for x in -39..39
        i = iterate x/40.0, y/40.0
        if i == 0 then print "*" else print " " end
      end
    end
  end

  def iterate(x,y)
    cr = y-0.5
    ci = x
    zi = zr = 0.0
    i = 0
    while true
      i += 1
      temp = zr * zi
      zr2 = zr * zr
      zi2 = zi * zi
      zr = zr2 - zi2 + cr
      zi = temp + temp + ci
      return i if zi2 + zr2 > BAILOUT
      return 0 if i > MAX_ITERATIONS
    end
  end
end

20.times { |n|
puts n
time = Time.now
Bench1.new
puts "\nRuby Elapsed %.3f" % (Time.now - time)
}