results.txt

Calculating -------------------------------------
                ruby         3 i/100ms
        java -client         1 i/100ms
        java -server         1 i/100ms
                node         3 i/100ms
              python         4 i/100ms
-------------------------------------------------
                ruby       37.9 (±2.6%) i/s -        381 in  10.054042s
        java -client       11.6 (±0.0%) i/s -        117 in  10.054871s
        java -server       11.6 (±0.0%) i/s -        116 in   9.997524s
                node       32.6 (±3.1%) i/s -        327 in  10.029777s
              python       44.0 (±2.3%) i/s -        444 in  10.091227s

Comparison:
              python:       44.0 i/s
                ruby:       37.9 i/s - 1.16x slower
                node:       32.6 i/s - 1.35x slower
        java -client:       11.6 i/s - 3.78x slower
        java -server:       11.6 i/s - 3.79x slower

test.rb

require 'benchmark/ips' # gem install benchmark-ips

unless File.file?("Hello.class")
  File.open('Hello.java', 'w') { |io|
    io << <<-CODE
		public class Hello {
		  public static void main(String[] args) {
                    int i = 2 + 2;
		  }
		}
    CODE
  }

  ok = system "javac", "Hello.java"
  ok or abort "could not compile Hello.java"
end

Benchmark.ips do |x|
  x.time = 10
  x.warmup = 2

  x.report("ruby")         { system "/usr/bin/ruby", "-e", "2 + 2" }
  x.report("java -client") { system "java", "-client", "Hello" }
  x.report("java -server") { system "java", "-server", "Hello" }
  x.report("node")         { system "/opt/boxen/nodenv/versions/v0.10.28/bin/node", "-e", "2 + 2" }
  x.report("python")       { system "python", "-c", "2 + 2" }

  x.compare!
end