JRuby versus Java impls of fib(35), both using RubyFixnum objects

gistfile1.txt

# Java impl of fib, statically typed but still using RubyFixnum objects

headius@headius-desktop:~/projects/jruby$ ~/hsx-hotspot/build/linux/jdk-linux-i586/bin/java -server -cp lib/jruby.jar:build/classes/test/ org.jruby.test.bench.BenchFixnumFibRecursive
Took 936ms for boxedFib(35) = 9227465
Took 847ms for boxedFib(35) = 9227465
Took 905ms for boxedFib(35) = 9227465
Took 943ms for boxedFib(35) = 9227465
Took 873ms for boxedFib(35) = 9227465

# Ruby impl of fib. The 20% different from Java is optimization opportunities in JRuby and invokedynamic, but we're very close to Java perf here.

headius@headius-desktop:~/projects/jruby$ JAVA_HOME=~/hsx-hotspot/build/linux/jdk-linux-i586/ bin/jruby -v --server bench/bench_fib_recursive.rb 5 35
jruby 1.7.0.dev (ruby-1.8.7-p330) (2011-08-09 fffffff) (OpenJDK Server VM 1.7.0) [linux-i386-java]
9227465
  1.385000   0.000000   1.385000 (  1.274000)
9227465
  1.156000   0.000000   1.156000 (  1.156000)
9227465
  1.158000   0.000000   1.158000 (  1.158000)
9227465
  1.181000   0.000000   1.181000 (  1.180000)
9227465
  1.152000   0.000000   1.152000 (  1.152000)