rsec is faster than parsec

rsec is faster than parsec!

      user     system      total        real

rsec result:    32918.38
  0.109000   0.000000   0.109000 (  0.107006)

rsec rpn:       32918.38
  0.140000   0.000000   0.140000 (  0.154009)

treetop result: 32918.38
  1.638000   0.000000   1.638000 (  1.638094)

treetop without calculation
#<Treetop::Runtime::SyntaxNode:0x1ddcb58>
  1.373000   0.000000   1.373000 (  1.382079)

parsec result:  32917
  0.156000   0.000000   0.156000 (  0.149009)