在搞清楚&block的用法时看到的bechmack方法

来源:http://blog.sidu.in/2007/11/ruby-blocks-gotchas.html
以后在测试性能时可能会用到.记在此.

Benchmark.bmbm(10) do |rpt|
 rpt.report("foo") do
   n.times {foo('Sidu', 'Ponnappa'){|name| "Hello #{name}"}}
 end

 rpt.report("bar") do
  n.times {bar('Sidu', 'Ponnappa'){|name| "Hello #{name}"}}
  end

 rpt.report("ooga") do
  n.times {
    the_block = lambda {|name| "Hello #{name}"}
    ooga('Sidu', 'Ponnappa', the_block)
  }
 end
end

显示结果:
Starting benchmark
 
Rehearsal ---------------------------------------------
foo         0.781000   0.000000   0.781000 (  0.782000)
bar         1.406000   0.000000   1.406000 (  1.406000)
ooga        1.438000   0.016000   1.454000 (  1.453000)
 ------------------------------------ total: 3.641000sec

                user     system      total        real
foo         0.782000   0.000000   0.782000 (  0.781000)
bar         1.375000   0.015000   1.390000 (  1.406000)
 ooga        1.453000   0.032000   1.485000 (  1.485000)