I'm seeing my ffi version of chipmunk bindings are about 10 times slower.  Can any experts take a look and tell me if I'm doing something wrong?

http://github.com/shawn42/chipmunk-ffi

you will need ffi 0.6 and nice-ffi 0.2 and chipmunk built from svn ( http://code.google.com/p/chipmunk-physics/source/checkout )

/Shawn

perf test:

require 'rubygems'
require 'benchmark'

n = 10000
Benchmark.bm do |x|
  # old bindings
  require 'chipmunk'
  x.report("cp vec2    ") {
    n.times do
      vec2(4,3)
    end
  }
  x.report("cp vec2 sub") {
    n.times do
      vec2(4,3)-vec2(5,6)
    end
  }
  # new bindings
  require 'chipmunk-ffi'
  x.report("cp-ffi vec2") {
    n.times do
      vec2(4,3)
    end
  }
  x.report("cp vec2 ffi sub") {
    n.times do
      vec2(4,3)-vec2(5,6)
    end
  }
end