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POWhat causes the extreme slowness when changing from rails 3.2.12 to 3.2.13
 

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  1. POWhat causes the extreme slowness when changing from rails 3.2.12 to 3.2.13
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    <p>This morning, I updated rails from 3.2.12 to 3.2.13, which resulted in a major delay in loading my views. This is from loading my home page:</p> <pre><code>Rails 3.2.12: Completed 200 OK in 387ms (Views: 339.0ms | ActiveRecord: 27.1ms) Rails 3.2.13: Completed 200 OK in 4416ms (Views: 4361.2ms | ActiveRecord: 28.7ms) </code></pre> <p>The only difference between the two commits it the Rails version, which of course did also result in a lot of other gems being updated... This is the difference in the Gemfile.lock:</p> <pre><code>GEM remote: https://rubygems.org/ specs: - actionmailer (3.2.12) - actionpack (= 3.2.12) - mail (~&gt; 2.4.4) - actionpack (3.2.12) - activemodel (= 3.2.12) - activesupport (= 3.2.12) + actionmailer (3.2.13) + actionpack (= 3.2.13) + mail (~&gt; 2.5.3) + actionpack (3.2.13) + activemodel (= 3.2.13) + activesupport (= 3.2.13) builder (~&gt; 3.0.0) erubis (~&gt; 2.7.0) journey (~&gt; 1.0.4) @@ -14,19 +14,19 @@ GEM rack-cache (~&gt; 1.2) rack-test (~&gt; 0.6.1) sprockets (~&gt; 2.2.1) - activemodel (3.2.12) - activesupport (= 3.2.12) + activemodel (3.2.13) + activesupport (= 3.2.13) builder (~&gt; 3.0.0) - activerecord (3.2.12) - activemodel (= 3.2.12) - activesupport (= 3.2.12) + activerecord (3.2.13) + activemodel (= 3.2.13) + activesupport (= 3.2.13) arel (~&gt; 3.0.2) tzinfo (~&gt; 0.3.29) - activeresource (3.2.12) - activemodel (= 3.2.12) - activesupport (= 3.2.12) - activesupport (3.2.12) - i18n (~&gt; 0.6) + activeresource (3.2.13) + activemodel (= 3.2.13) + activesupport (= 3.2.13) + activesupport (3.2.13) + i18n (= 0.6.1) multi_json (~&gt; 1.0) airbrake (3.1.7) activesupport @@ -129,7 +129,7 @@ GEM hashr (0.0.22) hike (1.2.1) honeypot-captcha (0.0.2) - i18n (0.6.4) + i18n (0.6.1) journey (1.0.4) jquery-rails (2.2.0) railties (&gt;= 3.0, &lt; 5.0) @@ -146,7 +146,7 @@ GEM kgio (2.8.0) listen (0.7.2) lumberjack (1.0.2) - mail (2.4.4) + mail (2.5.3) i18n (&gt;= 0.4.0) mime-types (~&gt; 1.16) treetop (~&gt; 1.4.8) @@ -155,7 +155,7 @@ GEM mime-types (1.21) mocha (0.10.5) metaclass (~&gt; 0.0.1) - multi_json (1.6.1) + multi_json (1.7.1) mysql2 (0.3.11) nested_form (0.3.1) net-scp (1.0.4) @@ -180,14 +180,14 @@ GEM rack rack-test (0.6.2) rack (&gt;= 1.0) - rails (3.2.12) - actionmailer (= 3.2.12) - actionpack (= 3.2.12) - activerecord (= 3.2.12) - activeresource (= 3.2.12) - activesupport (= 3.2.12) + rails (3.2.13) + actionmailer (= 3.2.13) + actionpack (= 3.2.13) + activerecord (= 3.2.13) + activeresource (= 3.2.13) + activesupport (= 3.2.13) bundler (~&gt; 1.0) - railties (= 3.2.12) + railties (= 3.2.13) rails_admin (0.4.3) bootstrap-sass (~&gt; 2.2) builder (~&gt; 3.0) @@ -202,9 +202,9 @@ GEM rails (~&gt; 3.1) remotipart (~&gt; 1.0) sass-rails (~&gt; 3.1) - railties (3.2.12) - actionpack (= 3.2.12) - activesupport (= 3.2.12) + railties (3.2.13) + actionpack (= 3.2.13) + activesupport (= 3.2.13) rack-ssl (~&gt; 1.3.2) rake (&gt;= 0.8.7) rdoc (~&gt; 3.4) @@ -212,7 +212,7 @@ GEM raindrops (0.10.0) rake (10.0.3) rb-fsevent (0.9.1) - rdoc (3.12.1) + rdoc (3.12.2) json (~&gt; 1.4) remotipart (1.0.2) rest-client (1.6.7) @@ -266,7 +266,7 @@ GEM eventmachine (&gt;= 0.12.6) rack (&gt;= 1.0.0) thor (0.17.0) - tilt (1.3.4) + tilt (1.3.6) tire (0.5.4) activemodel (&gt;= 3.0) hashr (~&gt; 0.0.19) @@ -280,7 +280,7 @@ GEM actionpack (&gt;= 3.1) execjs railties (&gt;= 3.1) - tzinfo (0.3.35) + tzinfo (0.3.37) uglifier (1.3.0) execjs (&gt;= 0.3.0) multi_json (~&gt; 1.0, &gt;= 1.0.2) @@ -325,7 +325,7 @@ DEPENDENCIES nested_form newrelic_rpm (~&gt; 3.5.5.38) pry - rails (= 3.2.12) + rails (= 3.2.13) rails_admin rb-fsevent (= 0.9.1) rmagick </code></pre> <p>Other then these two files nothing has changed.</p> <p>From reading <a href="https://stackoverflow.com/questions/15317048/diagnosing-the-cause-of-slow-view-rendering">Diagnosing the cause of slow view rendering</a> I understand that stuff in the asset pipeline can be slowing it down, but I dont see a difference when I change the value of "config.assets.debug = false" inside of development.rb.</p> <p>I suppose I do have a lot of assets in my asset pipeline I still need to clean up, which I will do before I deploy to production, but I wonder why this has now suddenly caused the lag after updating Rails. Question is: What is causing it and can I do something about it?</p> <p>Let me know if you need more info. Any help is greatly appreciated.</p> <p>EDIT: I also created an issue on the github.com/rails/rails, which seems to be picked up as a regression: <a href="https://github.com/rails/rails/issues/9803" rel="nofollow noreferrer">https://github.com/rails/rails/issues/9803</a>.</p>
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    1. COHave you tried running your server with `RACK_ENV=PRODUCTION`?
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    2. COI did now.. No difference (Completed 200 OK in 4566ms (Views: 4510.4ms | ActiveRecord: 28.8ms)), but thanks for the suggestion.
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    3. CONo difference for my production application after the update.
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