class Rack::RubyProf::RackProfiler

   # File lib/ruby-prof/rack.rb
53 def initialize(options)
54   @options = options
55 
56   @profile = ::RubyProf::Profile.new(profiling_options)
57   @profile.start
58   @profile.pause
59 
60   @printer_klasses = options[:printers] || default_printers
61 
62   @tmpdir = options[:path]
63 
64   @max_requests = options[:max_requests] || 1
65   @requests_count = 0
66 
67   @printed = false
68   # if running across multiple requests, we want to make sure that the
69   # ongoing profile is not lost if the process shuts down before the
70   # max request count is reached
71   ObjectSpace.define_finalizer(self, proc { print! })
72 end

   # File lib/ruby-prof/rack.rb
83 def max_requests_reached?
84   @requests_count >= @max_requests
85 end

   # File lib/ruby-prof/rack.rb
78 def pause
79   @profile.pause
80   @requests_count += 1
81 end

    # File lib/ruby-prof/rack.rb
 87 def print!(prefix = nil)
 88   return false if @printed || @requests_count == 0
 89 
 90   data = @profile.stop
 91 
 92   prefix ||= "multi-requests-#{@requests_count}"
 93 
 94   @printer_klasses.each do |printer_klass, base_name|
 95     printer = printer_klass.new(data)
 96 
 97     if base_name.respond_to?(:call)
 98       base_name = base_name.call
 99     end
100 
101     if printer_klass == ::RubyProf::MultiPrinter \
102         || printer_klass == ::RubyProf::CallTreePrinter
103       printer.print(@options.merge(:profile => "#{prefix}-#{base_name}"))
104     else
105       file_name = ::File.join(@tmpdir, "#{prefix}-#{base_name}")
106       ::File.open(file_name, 'wb') do |file|
107         printer.print(file, @options)
108       end
109     end
110   end
111 
112   @printed = true
113 end

   # File lib/ruby-prof/rack.rb
74 def resume
75   @profile.resume
76 end