From: Ola Bini <Ola.Bini@...>
Date: 2006-05-25T22:39:15+09:00
Subject: Re: How use Profiling, a Quick Guide.



----- Original Message -----
From: Pedro C�rte-Real <pedrocr@gmail.com>
Date: Thursday, May 25, 2006 12:41 pm
Subject: Re: How use Profiling, a Quick Guide.
To: ruby-talk@ruby-lang.org (ruby-talk ML)

> On 5/24/06, Victor Shepelev <vshepelev@imho.com.ua> wrote:
> > Here can help my Module#add_tracer, described here
> > http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/192291
> 
> That's a nice idea. I made a small modification to count the totals of
> each of the calling methods instead of printing each time:
> 
> $traces = Hash.new(0)
> 
> class Module
>  def add_tracer(meth)
>    m_alias = case meth
>      when :[] : "old_idx"
>      when :+ : "old_plus"
>      when :- : "old_minus"
>      #and so on
>      else ; "old_#{meth}"
>    end
>    module_eval %Q{
>      alias :#{m_alias} :#{meth}
>      def #{meth}(*arg, &block)
>        str = caller[0]+"-"+self.class.name+"-##{meth}"
>        $traces[str] += 1
>        #{m_alias}(*arg, &block)
>      end
>    }
>  end
> end
> 
> Array.add_tracer(:each)
> 
> ....
> Your code here
> ....
> 
> $traces.each {|name, value| puts "#{name} - #{value} calls"}
> 
> You can also sort it by the value in the hash to get an ordered list.
> This will do for a hack but writing a tracing gem would be great.
> 
> Pedro.
> 
> 



Hi, this is interesting, and I tried something like it. It works fairly
well, but DON'T try to trace :+ with this, for obvious reasons... =)

/O