127 lines
3.6 KiB
Ruby
127 lines
3.6 KiB
Ruby
# Profile provides a way to Profile your Ruby application.
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#
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# Profiling your program is a way of determining which methods are called and
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# how long each method takes to complete. This way you can detect which
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# methods are possible bottlenecks.
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#
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# Profiling your program will slow down your execution time considerably,
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# so activate it only when you need it. Don't confuse benchmarking with
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# profiling.
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#
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# There are two ways to activate Profiling:
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#
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# == Command line
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#
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# Run your Ruby script with <code>-rprofile</code>:
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#
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# ruby -rprofile example.rb
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#
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# If you're profiling an executable in your <code>$PATH</code> you can use
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# <code>ruby -S</code>:
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#
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# ruby -rprofile -S some_executable
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#
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# == From code
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#
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# Just require 'profile':
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#
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# require 'profile'
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#
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# def slow_method
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# 5000.times do
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# 9999999999999999*999999999
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# end
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# end
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#
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# def fast_method
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# 5000.times do
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# 9999999999999999+999999999
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# end
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# end
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#
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# slow_method
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# fast_method
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#
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# The output in both cases is a report when the execution is over:
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#
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# ruby -rprofile example.rb
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#
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# % cumulative self self total
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# time seconds seconds calls ms/call ms/call name
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# 68.42 0.13 0.13 2 65.00 95.00 Integer#times
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# 15.79 0.16 0.03 5000 0.01 0.01 Fixnum#*
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# 15.79 0.19 0.03 5000 0.01 0.01 Fixnum#+
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# 0.00 0.19 0.00 2 0.00 0.00 IO#set_encoding
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# 0.00 0.19 0.00 1 0.00 100.00 Object#slow_method
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# 0.00 0.19 0.00 2 0.00 0.00 Module#method_added
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# 0.00 0.19 0.00 1 0.00 90.00 Object#fast_method
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# 0.00 0.19 0.00 1 0.00 190.00 #toplevel
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module Profiler__
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# internal values
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@@start = @@stack = @@map = @@array = nil
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PROFILE_PROC = proc{|event, file, line, id, binding, klass|
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case event
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when "call", "c-call"
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now = Process.times[0]
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@@stack.push [now, 0.0]
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when "return", "c-return"
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now = Process.times[0]
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key = [klass, id]
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if tick = @@stack.pop
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data = begin
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@@map[key] ||= [0, 0.0, 0.0, key]
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rescue NoMethodError
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@@array.find{|i| i[3] == key} || (@@array << [0, 0.0, 0.0, key])[-1]
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end
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data[0] += 1
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cost = now - tick[0]
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data[1] += cost
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data[2] += cost - tick[1]
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@@stack[-1][1] += cost if @@stack[-1]
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end
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end
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}
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module_function
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def start_profile
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@@start = Process.times[0]
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@@stack = []
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@@map = {}
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@@array = []
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set_trace_func PROFILE_PROC
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end
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def stop_profile
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set_trace_func nil
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end
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def print_profile(f)
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stop_profile
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total = Process.times[0] - @@start
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if total == 0 then total = 0.01 end
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data = @@map.values + @@array
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data = data.sort_by{|x| -x[2]}
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sum = 0
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f.printf " %% cumulative self self total\n"
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f.printf " time seconds seconds calls ms/call ms/call name\n"
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for d in data
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sum += d[2]
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f.printf "%6.2f %8.2f %8.2f %8d ", d[2]/total*100, sum, d[2], d[0]
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f.printf "%8.2f %8.2f %s\n", d[2]*1000/d[0], d[1]*1000/d[0], get_name(*d[3])
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end
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f.printf "%6.2f %8.2f %8.2f %8d ", 0.0, total, 0.0, 1 # ???
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f.printf "%8.2f %8.2f %s\n", 0.0, total*1000, "#toplevel" # ???
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end
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def get_name(klass, id)
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name = klass.to_s || ""
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if klass.kind_of? Class
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name += "#"
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else
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name += "."
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end
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name + id.id2name
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rescue NoMethodError => e
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name = e.message.slice(/#<.*?:0x[0-9a-f]+>/) || ""
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name + "." + id.id2name
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end
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private :get_name
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end
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