Rails 3-加快控制台加载时间 [英] Rails 3 - Speed up Console Loading Time
问题描述
我想知道是否有任何相对简单的方法来加快控制台加载时间，这种加载开始接近30秒。我有很多子类，它们的方法似乎不受 reload！的影响。因此，我最终打开和关闭控制台很多。 IRB可快速加载闪电。
I am wondering if there is any relatively easy way to speed up my console load time, which is starting to approach 30 seconds. I have a lot of subclasses whose methods don't seem to be affected by reload! so I end up opening and closing the console a lot. IRB loads lightning quick.
我有太多宝石吗？我该如何安排加载任务的时间，以便可以看到花费最多的时间？如您所见，我已经尝试了开发增强型宝石，但没有成功。该应用程序在乘员中很好用，只是通过控制台加载即可使我不满意。在具有2.4GHz和4GB RAM的MBP OSX 10.6.6上运行。不使用RVM。
Do I have too many gems? How do I go about timing the load tasks so I can see what is taking up the most time? As you can see, I've already tried the dev-boost gem to no avail. The app is fine in Passenger, it's just the console loading that bugs the crap out of me. Running on MBP OSX 10.6.6 with 2.4GHz and 4GB RAM. Not using RVM.
版本：
Ovid$ rails -v
Rails 3.0.3
Ovid$ ruby -v
ruby 1.9.2p136 (2010-12-25 revision 30365) [x86_64-darwin10]
内存：
Ovid$ vm_stat
Mach Virtual Memory Statistics: (page size of 4096 bytes)
Pages free: 118818.
Pages active: 341320.
Pages inactive: 99490.
Pages speculative: 310576.
Pages wired down: 112527.
"Translation faults": 23097323.
Pages copy-on-write: 1270961.
Pages zero filled: 13836659.
Pages reactivated: 36.
Pageins: 165761.
Pageouts: 0.
Object cache: 28 hits of 760846 lookups (0% hit rate)
Gemfile：
source 'http://rubygems.org'
gem 'rails', '3.0.3'
gem 'mysql2'
gem 'foreigner'
gem 'haml'
gem 'capistrano'
gem 'nokogiri'
#web services
gem 'yammer4r'
gem 'ruby-freshbooks'
#authentication gems from nifty generator
gem "bcrypt-ruby", :require => "bcrypt"
gem "mocha", :group => :test
gem 'authlogic'
#dev
group :development do
gem 'rails-dev-boost', :git => 'git://github.com/thedarkone/rails-dev-boost.git', :require => 'rails_development_boost'
end
#testing
group :test do
gem 'database_cleaner'
gem 'cucumber-rails'
gem 'cucumber'
gem 'rspec-rails'
gem 'spork'
gem 'launchy'
gem 'machinist'
gem 'faker'
gem 'capybara'
end
非常感谢！
推荐答案
我终于使用Benchmark找到了我的启动瓶颈。特别是，导航到bundler gem并在lib / bundler / runtime.rb中，找到执行Kernel.require的行，并将其包装为：
I finally found my startup bottlenecks using Benchmark. In particular, navigate to the bundler gem and in lib/bundler/runtime.rb, find the line that does Kernel.require and wrap it like this:
puts Benchmark.measure("require #{file}") {
Kernel.require file
}.format("%n: %t %r")
您可能必须在应用程序的某处（例如config / boot.rb中）添加要求的基准。这将显示您需要每颗宝石所需的时间。我无法保证您的结果会与我的结果相符，但是我发现有几颗宝石需要花费一秒钟的时间才能加载，而大多数情况下则不到1毫秒。有些是我开发不需要的宝石，但我确实需要开发环境中的一些任务，例如Capistrano，应该。我对启动的其他领域（初始化程序等）进行了基准测试，但是找不到任何明显的瓶颈。
You may have to add require 'benchmark' somewhere in your app, like in config/boot.rb. That will show you how long it takes to require each gem. I can't guarantee your results will match mine, but I had a few gems that were taking over a second to load compared with sub-millisecond for most. A few were gems that I didn't need for developing but I did need for some tasks in the development environment, e.g. capistrano, shoulda. I benchmarked other areas of startup (initializers, etc), but couldn't find any significant bottlenecks.
我还没有找到配置应用的干净方法只加载那些真正需要它们的任务。当我知道不需要这些宝石时，可能会创建一个名为：speedy的环境，并使用RAILS_ENV = speedy rails s / c进行启动。然后在Gemfile中，在某些情况下，我可以使用group：speedy排除那些宝石。
I haven't yet figured out a clean way to configure the app to only load those for tasks where they are really needed. Possibly, I could create an environment called :speedy and use RAILS_ENV=speedy rails s/c for startup when I know I don't need those gems. Then in Gemfile, I could use group :speedy to exclude those gems in certain cases.
总而言之，对我来说最大的启动烦恼就是必须加载整个环境运行耙任务。我可能可以排除大多数宝石，但是Gemfile会开始变得凌乱，所以我不知道它是否值得。
All that said, the biggest startup annoyance for me is having to load the entire environment to run a rake task. I could probably exclude most gems for that, but Gemfile would start to get messy so I don't know if it's worth it.
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