有没有办法计算Ruby方法被调用的次数? [英] Is there a way to count how many times a Ruby method is called?

问题描述

Ruby 有没有办法计算一个方法被调用了多少次?我知道 caller.first 为您提供了文件名、行号和调用方方法名称，但找不到任何进一步的相关信息.

Is there a way in Ruby to count how many times a method is called? I know that caller.first gives you the file name, line number, and caller method name, but couldn't find any further related information.

推荐答案

使用 TracePoint 在调用方法时运行代码块，然后根据方法名称进行过滤.

Use TracePoint to run a block of code whenever a method is called, then filter based on the method name.

def foo() end

count = 0
name = :foo

TracePoint.trace(:call) do |t|
  count += 1 if t.method_id == name
end

count # => 0
foo
count # => 1
foo
count # => 2

count 这里只是一个由 .trace 块关闭的局部变量.您可以将其调整为常量、实例变量或任何最适合您的用例的变量.

count here is simply a local variable that is closed over by the .trace block. You can adjust this to be a constant, or an instance variable, or whatever best suits your use case.

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