mirror of
https://github.com/discourse/discourse.git
synced 2024-11-30 09:44:34 +08:00
130 lines
3.2 KiB
Ruby
130 lines
3.2 KiB
Ruby
# Some based on : https://gist.github.com/277289
|
|
#
|
|
# This is a rudimentary script that allows us to
|
|
# quickly determine if any gems are slowing down startup
|
|
|
|
require 'benchmark'
|
|
require 'fileutils'
|
|
|
|
module RequireProfiler
|
|
class << self
|
|
|
|
attr_accessor :stats
|
|
|
|
def profiling_enabled?
|
|
@profiling_enabled
|
|
end
|
|
|
|
def profile
|
|
start
|
|
yield
|
|
stop
|
|
end
|
|
|
|
def start(tmp_options={})
|
|
@start_time = Time.now
|
|
[ ::Kernel, (class << ::Kernel; self; end) ].each do |klass|
|
|
klass.class_eval do
|
|
def require_with_profiling(path, *args)
|
|
RequireProfiler.measure(path, caller, :require) { require_without_profiling(path, *args) }
|
|
end
|
|
alias require_without_profiling require
|
|
alias require require_with_profiling
|
|
|
|
def load_with_profiling(path, *args)
|
|
RequireProfiler.measure(path, caller, :load) { load_without_profiling(path, *args) }
|
|
end
|
|
alias load_without_profiling load
|
|
alias load load_with_profiling
|
|
end
|
|
end
|
|
# This is necessary so we don't clobber Bundler.require on Rails 3
|
|
Kernel.class_eval { private :require, :load }
|
|
@profiling_enabled = true
|
|
end
|
|
|
|
def stop
|
|
@stop_time = Time.now
|
|
[ ::Kernel, (class << ::Kernel; self; end) ].each do |klass|
|
|
klass.class_eval do
|
|
alias require require_without_profiling
|
|
alias load load_without_profiling
|
|
end
|
|
end
|
|
@profiling_enabled = false
|
|
end
|
|
|
|
def measure(path, full_backtrace, mechanism, &block)
|
|
# Path may be a Pathname, convert to a String
|
|
path = path.to_s
|
|
|
|
@stack ||= []
|
|
self.stats ||= {}
|
|
|
|
stat = self.stats.fetch(path){|key| self.stats[key] = {calls: 0, time: 0, parent_time: 0} }
|
|
|
|
@stack << stat
|
|
|
|
time = Time.now
|
|
begin
|
|
output = yield # do the require or load here
|
|
ensure
|
|
delta = Time.now - time
|
|
stat[:time] += delta
|
|
stat[:calls] += 1
|
|
@stack.pop
|
|
@stack.each do |frame|
|
|
frame[:parent_time] += delta
|
|
end
|
|
end
|
|
|
|
output
|
|
end
|
|
|
|
def time_block
|
|
start = Time.now
|
|
yield
|
|
Time.now - start
|
|
end
|
|
|
|
def gc_analyze
|
|
ObjectSpace.garbage_collect
|
|
gc_duration_start = time_block { ObjectSpace.garbage_collect }
|
|
old_objs = ObjectSpace.count_objects
|
|
yield
|
|
ObjectSpace.garbage_collect
|
|
gc_duration_finish = time_block { ObjectSpace.garbage_collect }
|
|
new_objs = ObjectSpace.count_objects
|
|
|
|
puts "New objects: #{(new_objs[:TOTAL] - new_objs[:FREE]) - (old_objs[:TOTAL] - old_objs[:FREE])}"
|
|
puts "GC duration: #{gc_duration_finish}"
|
|
puts "GC impact: #{gc_duration_finish - gc_duration_start}"
|
|
end
|
|
|
|
end
|
|
end
|
|
|
|
|
|
|
|
# RequireProfiler.gc_analyze do
|
|
# # require 'mime-types'
|
|
# require 'highline'
|
|
# end
|
|
# exit
|
|
|
|
RequireProfiler.profile do
|
|
Bundler.definition.dependencies.each do |dep|
|
|
begin
|
|
require dep.name unless dep.name =~ /timecop/
|
|
rescue Exception
|
|
# don't care
|
|
end
|
|
end
|
|
end
|
|
|
|
sorted = RequireProfiler.stats.to_a.sort{|a,b| b[1][:time] - b[1][:parent_time] <=> a[1][:time] - a[1][:parent_time]}
|
|
|
|
sorted[0..120].each do |k, v|
|
|
puts "#{k} : time #{v[:time] - v[:parent_time]} "
|
|
end
|