Class: Merb::Rack::Profiler

Inherits:
Middleware show all
Defined in:
merb-core/lib/merb-core/rack/middleware/profiler.rb

Instance Method Summary collapse

Methods included from DeferrableMiddleware

#deferred?

Constructor Details

#initialize(app, types = [RubyProf::ALLOCATIONS, RubyProf::PROCESS_TIME]) ⇒ Profiler

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Profiler



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# File 'merb-core/lib/merb-core/rack/middleware/profiler.rb', line 12

def initialize(app, types = [RubyProf::ALLOCATIONS, RubyProf::PROCESS_TIME])
  super(app)
  @types = types
end

Instance Method Details

#call(env) ⇒ Object



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# File 'merb-core/lib/merb-core/rack/middleware/profiler.rb', line 18

def call(env)
  measure_names = { RubyProf::ALLOCATIONS => 'allocations', 
    RubyProf::PROCESS_TIME => 'time', RubyProf::MEMORY => "memory" }

  ret = nil

  GC.disable
  @types.each do |type|
    next if type.nil?
    
    if GC.respond_to?(:enable_stats)
      GC.enable_stats || GC.clear_stats
    end

    RubyProf.measure_mode = type
    RubyProf.start
    100.times do
      ret = super
    end
    result = RubyProf.stop
    printer = RubyProf::CallTreePrinter.new(result)
    path = "merb_profile_results" / env["PATH_INFO"]
    FileUtils.mkdir_p(path)
    printer.print(
      File.open(
        "#{path}/callgrind.out.#{measure_names[RubyProf::measure_mode]}",     
        'w'))

    GC.disable_stats if GC.respond_to?(:disable_stats)
  end
  GC.enable
  ret
end