Benchmark可以用来测试某个函数或者任何代码的执行时间。
用法很简单：
require 'benchmark'
n = 1500
Benchmark.bmbm do |x|
x.report("+ method") { n.times {string1 = "ddd" + "11111" + "Helodd" } }
x.report("<< method") { n.times {string2 = "ddd" << "11111" << "Helodd"} }
end
结果如下：
usermatoMacBook-Pro:test qichunren$ ruby test.rb
Rehearsal ---------------------------------------------
+ method 0.000000 0.000000 0.000000 ( 0.001722)
<< method 0.000000 0.000000 0.000000 ( 0.001073)
------------------------------------ total: 0.000000sec
user system total real
+ method 0.000000 0.000000 0.000000 ( 0.001040)
<< method 0.000000 0.000000 0.000000 ( 0.000719)