我一直注意到Rails 3.1中资产管道的页面加载时间非常慢.每个资产(css / js / image)需要半秒到一秒才能加载.这真的开始阻碍发展.我在制作中没有同样的问题.
有什么解决方案吗？下面的日志文件显示了每个单独资产的加载速度为0.5 – 0.3秒：
# load of page itself... ... Completed 200 OK in 1231ms (Views: 933.0ms | ActiveRecord: 15.6ms) Started GET "/assets/blueprint/screen.css?body=1" for 127.0.0.1 at 2012-01-15 15:53:00 +0000 Served asset /blueprint/screen.css - 304 Not Modified (0ms) Started GET "/assets/application.css?body=1" for 127.0.0.1 at 2012-01-15 15:53:00 +0000 Served asset /application.css - 304 Not Modified (0ms) Started GET "/assets/blueprint/print.css?body=1" for 127.0.0.1 at 2012-01-15 15:53:00 +0000 Served asset /blueprint/print.css - 304 Not Modified (0ms) Started GET "/assets/universal/application.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:01 +0000 Served asset /universal/application.js - 304 Not Modified (2ms) Started GET "/assets/universal/animate-color.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:01 +0000 Served asset /universal/animate-color.js - 304 Not Modified (0ms) Started GET "/assets/universal/animate-shadow.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:02 +0000 Served asset /universal/animate-shadow.js - 304 Not Modified (0ms) Started GET "/assets/jquery_ujs.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:02 +0000 Served asset /jquery_ujs.js - 304 Not Modified (0ms) Started GET "/assets/universal/jquery.placehold.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:02 +0000 Served asset /universal/jquery.placehold.js - 304 Not Modified (0ms) Started GET "/assets/universal/autoresize.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:03 +0000 Served asset /universal/autoresize.js - 304 Not Modified (0ms) Started GET "/assets/universal/utilities.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:03 +0000 Served asset /universal/utilities.js - 304 Not Modified (0ms) Started GET "/assets/universal/validators.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:03 +0000 Served asset /universal/validators.js - 304 Not Modified (0ms) Started GET "/assets/jquery.js?body=1" for 127.0.0.1 at 2012-01-15 15:53:04 +0000 Served asset /jquery.js - 304 Not Modified (0ms) Started GET "/assets/whitelabel/pingpanel/pingpanel.css?body=1" for 127.0.0.1 at 2012-01-15 15:53:04 +0000 Served asset /whitelabel/pingpanel/pingpanel.css - 304 Not Modified (0ms) Started GET "/assets/logo.png" for 127.0.0.1 at 2012-01-15 15:53:05 +0000 Served asset /logo.png - 304 Not Modified (0ms) Started GET "/assets/application_bar_background.png" for 127.0.0.1 at 2012-01-15 15:53:05 +0000 Served asset /application_bar_background.png - 304 Not Modified (0ms) Started GET "/assets/linen-new.jpg" for 127.0.0.1 at 2012-01-15 15:53:06 +0000 Served asset /linen-new.jpg - 304 Not Modified (0ms)
在chrome网络分析仪中可以更清楚地看到减速的影响：
解决方法
每当加载资产时,它必须通过Rails环境传递,Rails将重新加载所有代码.当您拥有大量资产时,它将加起来缓慢加载页面.
试试rails-dev-tweaks gem,它可以让你更好地控制Rails何时重新加载代码.应该解决你的减速问题.
