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Computer Language Benchmarks Game      [[ Play ]]

- all benchmarks - n-body fannkuch-redux meteor-contest fasta fasta-redux spectral-norm reverse-complement mandelbrot k-nucleotide regex-dna pidigits chameneos-redux thread-ring binary-trees-redux binary-trees - all languages - Ada 2005 GNAT ATS C gcc Clojure C# Mono C++ g++ Dart Erlang Erlang HiPE F# Mono Fortran Intel Go Haskell GHC Java 7 Lisp SBCL OCaml Pascal Free Pascal Perl PHP Python 3 Racket Ruby 2.0 Ruby JRuby Scala x86 one core x64 quad-core x86 quad-core x64 one core

 performance measurements

Each table row shows performance measurements for this Ruby 2.0 program with a particular command-line input value N.

N	CPU secs	Elapsed secs	Memory KB	Code B	≈ CPU Load

Read the ↓ make, command line, and program output logs to see how this program was run.

Read mandelbrot benchmark to see what this program should do.

 notes

ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-linux]

 mandelbrot Ruby 2.0 program source code

# The Computer Language Benchmarks Game
# http://benchmarksgame.alioth.debian.org
#
#  contributed by Karl von Laudermann
#  modified by Jeremy Echols
#  modified by Detlef Reichl
#  modified by Joseph LaFata

size = ARGV.shift.to_i

puts "P4\n#{size} #{size}"

byte_acc = 0
bit_num = 0

count_size = size - 1               # Precomputed size for easy for..in looping
range = 0..count_size

# For..in loops are faster than .upto, .downto, .times, etc.
# That's not true, but left it here
for y in range
  ci = (2.0*y/size)-1.0
  for x in range
    zrzr = zr = 0.0
    zizi = zi = 0.0
    cr = (2.0*x/size)-1.5
    escape = 0b1

    50.times do
      tr = zrzr - zizi + cr
      ti = 2.0*zr*zi + ci
      zr = tr
      zi = ti
      # preserve recalculation
      zrzr = zr*zr
      zizi = zi*zi
      if zrzr+zizi > 4.0
        escape = 0b0
        break
      end
    end

    byte_acc = (byte_acc << 1) | escape
    bit_num += 1

    # Code is very similar for these cases, but using separate blocks
    # ensures we skip the shifting when it's unnecessary, which is most cases.
    if (bit_num == 8)
      print byte_acc.chr
      byte_acc = 0
      bit_num = 0
    elsif (x == count_size)
      byte_acc <<= (8 - bit_num)
      print byte_acc.chr
      byte_acc = 0
      bit_num = 0
    end
  end
end

 make, command-line, and program output logs

Fri, 25 Jan 2013 09:26:43 GMT

COMMAND LINE:
/usr/local/src/ruby-1.9.3-p374/ruby mandelbrot.yarv 16000

(BINARY) PROGRAM OUTPUT NOT SHOWN

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