method call benchmark

gistfile1.rb

require "benchmark"

test_string = "test string"
n = 1_000_000
Benchmark.bmbm { |x|
   x.report("normal") { n.times { test_string.length } }
   x.report("send")   { n.times { test_string.send(:length) } }
   x.report("eval")   { n.times { eval "test_string.length" } }
}

result.txt

Rehearsal ------------------------------------------
normal   0.150000   0.000000   0.150000 (  0.142557)
send     0.210000   0.000000   0.210000 (  0.213529)
eval    15.360000   0.060000  15.420000 ( 15.443191)
-------------------------------- total: 15.780000sec

             user     system      total        real
normal   0.130000   0.000000   0.130000 (  0.129682)
send     0.220000   0.000000   0.220000 (  0.218464)
eval    15.310000   0.070000  15.380000 ( 15.405513)