如何使Rails 3资产预编译更快？ [英] How can I make Rails 3 assets precompile faster?

问题描述

我有一个正在运行的Rails 3.2.1应用程序，我通过Capistrano部署，运行 deploy：assets的 deploy / assets ：预编译任务。

除了编译本身很慢之外，一切工作都很好。我没有那么多的CSS和JavaScript（总共约8200行）。

编译资源大概需要1-3分钟，占整个部署时间的90％。

有没有办法优化这个？可能使用不同的过程来编译资产或以某种方式进行优化？

我在1.9.2-p290上的Linode 512上运行应用程序，Rails 3.2.1和使用 therubyracer gem，如果有任何相关性。

解决方案

对于使其运行速度更快的答案，但是就不同的程序而言，您可以告知Capistrano只有在实际对您的资产进行任何更改时，才能预编译资产。您将需要执行一个自定义的 assets：precompile 任务，这将查看现有和新部署的代码之间的git日志。对我来说，这样做很好，现在我只需要在更新资源时处理缓慢的部署：

 命名空间：deploy do 
命名空间：assets do 
任务：precompile，：roles => ：web，：except => {：no_release =>如果捕获（cd＃{latest_release}&＃{source.local.log（from）}供应商/资产/应用程序/资产，则为
 from = source.next_revision（current_revision）
 / | wc -l）。to_i> 0 
 run％Q {cd＃{latest_release}&& ＃{rake} RAILS_ENV =＃{rails_env}＃{asset_env} asset：precompile} 
 else 
 logger.info由于没有资产更改而跳过资产预编译
 end 
 end 
 end 
 end 
  

资料来源： http://www.bencurtis.com/2011/12/skipping-asset-compilation- with-capistrano /

I have a running Rails 3.2.1 application, that I'm deploying via Capistrano with the deploy/assets which runs the deploy:assets:precompile task.

Everything works just fine, except that the compilation itself is really slow. I don't have that much CSS and JavaScript (about 8200 lines total).

It generally takes about 1-3 minutes to compile the assets, which is about 90% of the whole deployment time.

Is there any way to optimize this? Maybe use a different procedure to compile the assets or somehow optimize it?

I'm running the app on Linode 512 on 1.9.2-p290, Rails 3.2.1 and using therubyracer gem if that's of any relevance.

解决方案

This isn't an answer on making it run faster, but as far as a "different procedure" goes, you can tell Capistrano to only precompile assets when you've actually made any changes to your assets. You would want to do a custom assets:precompile task something like this, which would look at the git logs between the existing and newly deployed code. For me, this worked great and now I only need to deal with slow deployment when updating assets:

namespace :deploy do
  namespace :assets do
    task :precompile, :roles => :web, :except => { :no_release => true } do
      from = source.next_revision(current_revision)
      if capture("cd #{latest_release} && #{source.local.log(from)} vendor/assets/ app/assets/ | wc -l").to_i > 0
        run %Q{cd #{latest_release} && #{rake} RAILS_ENV=#{rails_env} #{asset_env} assets:precompile}
      else
        logger.info "Skipping asset pre-compilation because there were no asset changes"
      end
    end
  end
end

Source: http://www.bencurtis.com/2011/12/skipping-asset-compilation-with-capistrano/

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