Object::Profiler
Track how many Ruby objects your code is creating. In the style of GC::Profiler and inspired by memprof.
Requirements
- A platform that supports DTrace (Solaris, OSX, etc)
- root access (required by DTrace)
Installation
Add this line to your application's Gemfile:
gem 'object_profiler'
And then execute:
$ bundle
Or install it yourself as:
$ gem install object_profiler
Usage
Object::Profiler.track {
require 'rdoc/rdoc'
}
# => Amount File:Line:Class
# => 1 /.../2.0.0/json/common.rb:67:JSON::Ext::Generator::State
# => 1 /.../2.0.0/json/common.rb:68:JSON::Ext::Generator::State
# => 1 /.../2.0.0/json/common.rb:75:JSON::Ext::Generator::State
# => 1 /.../2.0.0/rdoc/generator/markup.rb:65:Range
# => 1 /.../2.0.0/rdoc/text.rb:42:Hash
# => 1 /.../gems/2.0.0/gems/bundler-1.3.4/lib/bundler/rubygems_integration.rb:200:Gem::Dependency
# => 1 /.../gems/2.0.0/gems/bundler-1.3.4/lib/bundler/rubygems_integration.rb:207:Gem::LoadError
# => 1 /.../gems/2.0.0/gems/bundler-1.3.4/lib/bundler/shared_helpers.rb:23:Pathname
# => 1 /.../gems/2.0.0/gems/bundler-1.3.4/lib/bundler/shared_helpers.rb:23:String
# => 1 /.../site_ruby/2.0.0/rubygems/requirement.rb:52:Gem::Requirement
# => 2 /.../gems/2.0.0/gems/bundler-1.3.4/lib/bundler.rb:177:Pathname
# => 2 /.../gems/2.0.0/gems/bundler-1.3.4/lib/bundler.rb:177:String
# => 3 /.../gems/2.0.0/gems/bundler-1.3.4/lib/bundler/rubygems_ext.rb:23:Pathname
# => 5 /.../gems/2.0.0/gems/bundler-1.3.4/lib/bundler/rubygems_ext.rb:23:String
# => 6 /.../2.0.0/rdoc/class_module.rb:5:Range
# => 6 /.../2.0.0/rdoc/markdown/literals_1_9.rb:359:RDoc::Markdown::Literals::RuleInfo
# => 240 /.../2.0.0/rdoc/markdown.rb:508:RDoc::Markdown::RuleInfo
# => 274 Total
Usage - Rails Middleware
Add to your app initializers, ie config/initializers/object_profiler.rb:
require 'object/profiler/middleware'
My::Application.config.middleware.use(::Object::Profiler::Middleware, {:output => 'object_profiler.log'})
Run the server and tail the log:
sudo rails s