A benchmark of calling methods in different ways

bench.rb

require "benchmark"
test = "hi man"
m = test.method(:length)
n = 100000
Benchmark.bmbm {|x|
  x.report("meth") { n.times { test.length } }
  x.report("call") { n.times { m.call } }
  x.report("send") { n.times { test.send(:length) } }
  x.report("eval") { n.times { eval "test.length" } }
}

result

2.0.0-p353 ~ $ ruby bench.rb
Rehearsal ----------------------------------------
meth   0.000000   0.000000   0.000000 (  0.005811)
call   0.010000   0.000000   0.010000 (  0.010587)
send   0.010000   0.000000   0.010000 (  0.009120)
eval   0.610000   0.060000   0.670000 (  0.672308)
------------------------------- total: 0.690000sec

           user     system      total        real
meth   0.010000   0.000000   0.010000 (  0.005437)
call   0.010000   0.000000   0.010000 (  0.010529)
send   0.010000   0.000000   0.010000 (  0.009405)
eval   0.560000   0.030000   0.590000 (  0.587010)