headius (owner)

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~/projects/jruby ➔ jruby --server -rbenchmark -rjava -e "JObject = java.lang.Object; 10.times { puts Benchmark.measure {a = []; 1_000_000.times { a << JObject.new } } }"
  1.160000   0.000000   1.160000 (  1.078000)
  0.654000   0.000000   0.654000 (  0.655000)
  0.687000   0.000000   0.687000 (  0.687000)
  0.621000   0.000000   0.621000 (  0.621000)
  0.635000   0.000000   0.635000 (  0.635000)
  0.609000   0.000000   0.609000 (  0.609000)
  0.625000   0.000000   0.625000 (  0.625000)
  0.789000   0.000000   0.789000 (  0.789000)
  0.659000   0.000000   0.659000 (  0.659000)
  0.647000   0.000000   0.647000 (  0.647000)
 
~/projects/jruby ➔ ../jruby-1.4.0RC1/bin/jruby --server -rbenchmark -rjava -e "JObject = java.lang.Object; 10.times { puts Benchmark.measure {a = []; 1_000_000.times { a << JObject.new } } }"
  2.612000   0.000000   2.612000 (  2.516000)
  1.809000   0.000000   1.809000 (  1.809000)
  1.735000   0.000000   1.735000 (  1.735000)
  1.727000   0.000000   1.727000 (  1.727000)
  1.719000   0.000000   1.719000 (  1.719000)
  1.713000   0.000000   1.713000 (  1.713000)
  1.955000   0.000000   1.955000 (  1.955000)
  1.663000   0.000000   1.663000 (  1.663000)
  1.656000   0.000000   1.656000 (  1.656000)
  1.664000   0.000000   1.664000 (  1.664000)
 
~/projects/jruby ➔ jruby -rjava -e "JObject = java.lang.Object; a = []; 1_000_000.times { a << JObject.new }; java.lang.System.gc; p java.lang.management.ManagementFactory.memory_mxbean.heap_memory_usage"
init = 0(0K) used = 47785208(46665K) committed = 66650112(65088K) max = 66650112(65088K)
 
~/projects/jruby ➔ ../jruby-1.4.0RC1/bin/jruby -rjava -e "JObject = java.lang.Object; a = []; 1_000_000.times { a << JObject.new }; java.lang.System.gc; puts java.lang.management.ManagementFactory.memory_mxbean.heap_memory_usage"
init = 0(0K) used = 106234680(103744K) committed = 189644800(185200K) max = 520290304(508096K)
 
~/projects/jruby ➔ time jruby -rjava -e "JObject = java.lang.Object; a = []; 1_000_000.times { a << JObject.new }"
real	0m2.457s
user	0m2.170s
sys	0m0.221s
 
~/projects/jruby ➔ time ../jruby-1.4.0RC1/bin/jruby -rjava -e "JObject = java.lang.Object; a = []; 1_000_000.times { a << JObject.new }"
 
real	0m4.064s
user	0m3.663s
sys	0m0.316s