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