The asset pipeline is the slowest part of deploying a Rails app. How slow? On average, it's over 20x slower than installing dependencies via $ bundle install. Why so slow? In this article, we're going to take a look at some of the reasons the asset pipeline is slow and how we were able to get a 12x performance improvement on some apps with Sprockets version 3.3+.

Assets Pipeline 在 Rails 应用部署的时候是非常慢的部分。有多慢？平均来说，它比 $ bundle install 安装依赖慢 20 倍（应该是在整个部署过程中耗时相比）。为何慢？这篇文章，将会来看看一些 Assets Pipeline 慢的原因，以及我们在 Sprockets version 3.3+ 上已经做到了 12 倍的性能提升。

http://www.schneems.com/blogs/2016-02-18-speeding-up-sprockets/