PERF: production assets not minified

source url post processor forcing all scripts into an eval,
  minifier can not minify such files

config/initializers/10-discourse_iife.rb

@@ -1,5 +1,7 @@
 require 'discourse_iife'
-require 'source_url'
 
 Rails.application.assets.register_preprocessor('application/javascript', DiscourseIIFE)
-Rails.application.assets.register_postprocessor('application/javascript', SourceURL)
+unless Rails.env.production?
+  require 'source_url'
+  Rails.application.assets.register_postprocessor('application/javascript', SourceURL)
+end