Rails Asset Pipeline/Compass/SASS在开发模式下的编译速度非常慢 [英] Rails Asset Pipeline/Compass/SASS extremely slow to compile in development mode
问题描述
使用Rails 3.2，我的应用程序中大约加载了40个SASS文件.其中很大一部分是引导程序.
Using Rails 3.2, I have approximately 40 SASS files loading in my app. A large chunk of it is bootstrap.
任何页面的每次重新加载都需要10秒钟以上的时间.如果我删除<%= stylesheet_link_tag "application", :media => "all" %>页面，则几乎立即加载.
Each reload of any page takes 10+ seconds. If I remove <%= stylesheet_link_tag "application", :media => "all" %> pages load almost instantly.
调试导致样式缓慢的样式表的最佳方法是什么?还是我有40多个部分.css.scss文件全部在页面刷新时编译的事实?
What's the best way to debug which stylesheets are causing the slowness? Or is it just the fact that I have 40+ partial .css.scss files which are all compiled on page refresh?
几乎每个.scss文件的顶部都有一个@import"mixins"，它会加载一些基本颜色变量.不知道这是否也会减慢速度，我也不知道如何以其他任何方式在所有.scss文件中使用这些基色...
I have an @import "mixins" at the top of almost every .scss file, which loads some base color variables. Not sure if this might be slowing things down as well, nor do I know how to get these base colors to be available in all .scss files any other way...
I'd like to get this slowness fixed before using a live-reload gem, like mentioned here: http://blog.55minutes.com/2013/01/lightning-fast-sass-reloading-in-rails-32/
推荐答案
原来，fredwu在github上指出了一个问题:
Turns out there is an issue as pointed out by fredwu on the rails github:
我认为这是Sprockets解析器的问题: https://github.com/sstephenson/sprockets/blob/v2.2.2/lib/sprockets/trail.rb#L70-L83
I believe it's an issue with Sprockets' resolver: https://github.com/sstephenson/sprockets/blob/v2.2.2/lib/sprockets/trail.rb#L70-L83
Rails .12手动解析资产路径，而.13尝试使用 Sprockets解析器，然后引发异常.
Rails .12 resolves the asset paths manually whereas .13 tries to use Sprockets resolver, which then throws an exception.
临时问题是在您的gemfile中使用以下行:
The interim issue is to use the following line in your gemfile:
gem 'rails', git: "git://github.com/rails/rails.git", branch: "3-2-stable"
https://github.com/rails/rails/issues/9803
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