gistfile1.txt

~/projects/jruby ➔ ../jruby-1.3.1/bin/jruby --server -rjava -rbenchmark -e "a = java.util.ArrayList.new; 100000.times { a << java.lang.Object.new }; 5.times { puts Benchmark.measure { a.each { |x| x } } }"
  0.768000   0.000000   0.768000 (  0.716000)
  0.328000   0.000000   0.328000 (  0.328000)
  0.240000   0.000000   0.240000 (  0.241000)
  0.239000   0.000000   0.239000 (  0.239000)
  0.254000   0.000000   0.254000 (  0.254000)

~/projects/jruby ➔ ../jruby-1.4.0/bin/jruby --server -rjava -rbenchmark -e "a = java.util.ArrayList.new; 100000.times { a << java.lang.Object.new }; 5.times { puts Benchmark.measure { a.each { |x| x } } }"
  0.803000   0.000000   0.803000 (  0.748000)
  0.226000   0.000000   0.226000 (  0.226000)
  0.224000   0.000000   0.224000 (  0.224000)
  0.209000   0.000000   0.209000 (  0.209000)
  0.211000   0.000000   0.211000 (  0.211000)

~/projects/jruby ➔ bin/jruby --server -rjava -rbenchmark -e "a = java.util.ArrayList.new; 100000.times { a << java.lang.Object.new }; 5.times { puts Benchmark.measure { a.each { |x| x } } }"  0.721000   0.000000   0.721000 (  0.680000)
  0.240000   0.000000   0.240000 (  0.240000)
  0.166000   0.000000   0.166000 (  0.166000)
  0.166000   0.000000   0.166000 (  0.166000)
  0.191000   0.000000   0.191000 (  0.191000)

~/projects/jruby ➔ bin/jruby -J-Djruby.ji.objectProxyCache=false --server -rjava -rbenchmark -e "a = java.util.ArrayList.new; 100000.times { a << java.lang.Object.new }; 5.times { puts Benchmark.measure { a.each { |x| x } } }"
  0.533000   0.000000   0.533000 (  0.483000)
  0.138000   0.000000   0.138000 (  0.138000)
  0.080000   0.000000   0.080000 (  0.080000)
  0.081000   0.000000   0.081000 (  0.081000)
  0.072000   0.000000   0.072000 (  0.073000)