Scott Trace

scott_trace.rb

# -*- encoding : utf-8 -*-
class Object
  
  def scott_trace
    now = Time.now
    $last_scott_trace ||= now
    diff = now - $last_scott_trace
    notify = diff > 1 ? "!!!!!!!!!!!!!!" : ""
    puts "#{notify} RAM USAGE: #{`ps -o rss= -p #{$$}`.to_f / 1000.0} MB TIME:#{now - $last_scott_trace}, CALLER: #{CallChain.caller_info.inspect}"
    $last_scott_trace = now
  end
  
end


class CallChain
  def self.caller_method(depth=1)
    parse_caller(caller(depth+1).first).last
  end
  
  def self.caller_info(depth=1)
    parse_caller(caller(depth+1).first)
  end

  private

  #Stolen from ActionMailer, where this was used but was not made reusable
  def self.parse_caller(at)
    if /^(.+?):(\d+)(?::in `(.*)')?/ =~ at
      file   = Regexp.last_match[1]
      line   = Regexp.last_match[2].to_i
      method = Regexp.last_match[3]
      [file, line, method]
    end
  end
end