87 lines
2.7 KiB
Bash
Executable File
87 lines
2.7 KiB
Bash
Executable File
#!/usr/bin/env ruby
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# Example:
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# tools/profile_requires activesupport/lib/active_support.rb
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# tools/profile_requires activeresource/examples/simple.rb
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abort 'Use REE so you can profile memory and object allocation' unless GC.respond_to?(:enable_stats)
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ENV['NO_RELOAD'] ||= '1'
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ENV['RAILS_ENV'] ||= 'development'
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GC.enable_stats
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require 'rubygems'
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Gem.source_index
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require 'benchmark'
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module RequireProfiler
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private
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def require(file, *args) RequireProfiler.profile(file) { super } end
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def load(file, *args) RequireProfiler.profile(file) { super } end
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@depth, @stats = 0, []
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class << self
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attr_accessor :depth
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attr_accessor :stats
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def profile(file)
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stats << [file, depth]
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self.depth += 1
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heap_before, objects_before = GC.allocated_size, ObjectSpace.allocated_objects
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result = nil
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elapsed = Benchmark.realtime { result = yield }
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heap_after, objects_after = GC.allocated_size, ObjectSpace.allocated_objects
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self.depth -= 1
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stats.pop if stats.last.first == file
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stats << [file, depth, elapsed, heap_after - heap_before, objects_after - objects_before] if result
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result
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end
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end
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end
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GC.start
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before = GC.allocated_size
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before_gctime, before_gcruns = GC.time, GC.collections
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before_rss = `ps -o rss= -p #{Process.pid}`.to_i
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before_live_objects = ObjectSpace.live_objects
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path = ARGV.shift
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if mode = ARGV.shift
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require 'ruby-prof'
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RubyProf.measure_mode = RubyProf.const_get(mode.upcase)
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RubyProf.start
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else
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Object.instance_eval { include RequireProfiler }
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end
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elapsed = Benchmark.realtime { require path }
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results = RubyProf.stop if mode
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after_gctime, after_gcruns = GC.time, GC.collections
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GC.start
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after_live_objects = ObjectSpace.live_objects
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after_rss = `ps -o rss= -p #{Process.pid}`.to_i
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after = GC.allocated_size
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usage = (after - before) / 1024.0
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if mode
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if printer = ARGV.shift
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RubyProf.const_get("#{printer.to_s.classify}Printer").new(results).print($stdout)
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elsif RubyProf.const_defined?(:CallStackPrinter)
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File.open("#{File.basename(path, '.rb')}.#{mode}.html", 'w') do |out|
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RubyProf::CallStackPrinter.new(results).print(out)
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end
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else
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File.open("#{File.basename(path, '.rb')}.#{mode}.callgrind", 'w') do |out|
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RubyProf::CallTreePrinter.new(results).print(out)
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end
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end
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end
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RequireProfiler.stats.each do |file, depth, sec, bytes, objects|
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if sec
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puts "%10.2f KB %10d obj %8.1f ms %s%s" % [bytes / 1024.0, objects, sec * 1000, ' ' * depth, file]
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else
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puts "#{' ' * (42 + depth)}#{file}"
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end
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end
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puts "%10.2f KB %10d obj %8.1f ms %d KB RSS %8.1f ms GC time %d GC runs" % [usage, after_live_objects - before_live_objects, elapsed * 1000, after_rss - before_rss, (after_gctime - before_gctime) / 1000.0, after_gcruns - before_gcruns]
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