Class: ZenProfiler

Inherits:
EventHook
  • Object
show all
Defined in:
lib/zenprofiler.rb

Overview

ZenProfiler provides a faster version of the standard library ruby profiler. It is otherwise pretty much the same as before.

Invoke it via:

% zenprofile misc/factorial.rb

or:

% ruby -rzenprofile misc/factorial.rb

Constant Summary collapse

VERSION = 
'1.3.2'
@@start = 
nil
@@stack = 
[[0, 0, [nil, :toplevel]], [0, 0, [nil, :dummy]]]
@@map = 
Hash.new { |h,k| h[k] = [0, 0.0, 0.0, k] }
@@percent_time_threshold = 
0.5

Class Method Summary collapse

Class Method Details

.percent_time_threshold ⇒ Object 



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# File 'lib/zenprofiler.rb', line 41

def self.percent_time_threshold
  @@percent_time_threshold
end

.percent_time_threshold=(percent_time_threshold) ⇒ Object 



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# File 'lib/zenprofiler.rb', line 45

def self.percent_time_threshold=(percent_time_threshold)
  @@percent_time_threshold = percent_time_threshold
end

.print_profile(f, opts = {}) ⇒ Object 



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# File 'lib/zenprofiler.rb', line 49

def self.print_profile(f, opts = {})
  stop_hook

  @@total = Time.now.to_f - @@start
  @@total = 0.01 if @@total == 0
  @@total2 = Process.times[0] - @@start2
  @@map["#toplevel"][1] = @@total
  data = @@map.values.sort_by { |vals| -vals[2] }
  sum = 0

  f.puts "Total time = %f" % @@total
  f.puts "Total time = %f" % @@total2
  f.puts
  f.puts "          total     self              self    total"
  f.puts "% time  seconds  seconds    calls  ms/call  ms/call  name"

  @@total = data.inject(0) { |acc, (_, _, self_ms, _)| acc + self_ms }

  data.each do |calls, total_ms, self_ms, name|
    percent_time = self_ms / @@total * 100.0

    next if percent_time < @@percent_time_threshold

    sum += self_ms
    klass = name.first
    meth  = name.last.to_s

    signature =
      if klass.nil?
        meth
      elsif klass.kind_of?(Module)
        klassname = klass.name rescue klass.to_s.sub(/#<\S+:(\S+)>/, '\\1')
        "#{klassname}##{meth}"
      else
        "#{klass}##{meth}"
      end

    f.printf "%6.2f ",  percent_time
    f.printf "%8.2f ", sum
    f.printf "%8.2f ",  self_ms
    f.printf "%8d ",    calls
    f.printf "%8.2f ",  (self_ms * 1000.0 / calls)
    f.printf "%8.2f ",  (total_ms * 1000.0 / calls)
    f.printf "%s",      signature
    f.puts
  end
end

.process(event, obj, method, klass) ⇒ Object 



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# File 'lib/zenprofiler.rb', line 98

def self.process event, obj, method, klass
  case event
  when CALL, CCALL
    now = Process.times[0]
    @@stack.push [now, 0.0]
  when RETURN, CRETURN
    klass = klass.name rescue return
    key = [klass, method]
    if tick = @@stack.pop
      now = Process.times[0]
      data = @@map[key]
      data[0] += 1
      cost = now - tick[0]
      data[1] += cost
      data[2] += cost - tick[1]
      @@stack[-1][1] += cost if @@stack[-1]
    end
  end
end

.run(fp = $stdout, opts = {}) ⇒ Object 



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# File 'lib/zenprofiler.rb', line 28

def self.run(fp = $stdout, opts = {})
  at_exit {
    ZenProfiler::print_profile fp, opts
  }
  ZenProfiler::start_hook
end

.start_hook ⇒ Object 



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# File 'lib/zenprofiler.rb', line 35

def self.start_hook
  @@start  ||= Time.now.to_f
  @@start2 ||= Process.times[0]
  super
end