How to improve render html speed [closed]

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My rails app works fine, but is too slow in rendering from DB. Example: "Completed in 4027ms (View: 3758, DB: 87)". Rails 2.3.8. How can I improve the html render speed in rails apps?

USING: action.html.er开发者_如何学运维b

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I am sure:

1. You are making queries inside your view
2. You are rendering a lot of partial
3. You are nesting rendering partials
4. You are using expensive Ruby operations in your views (sorting, selecting, maping)
5. You are nesting expensive operations (n2, n4... code)

Examples, to explain it:

1. @my_objects = MyObject.where(:foo => :bar).all
2. @my_objects.each{ |object| render object }
3. @my_objects.each{ |object| render object }
   _object.html.erb object.children.each{ |child| render child }
4. @my_objects.sort_by{ |a,b| a.id <=> b.id }
5. @my_objects.sort_by{ |a,b| a.map(&:id).last.name <=> b.map(&:id).last.name }

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1/ Probably you are making lots of things in your view (ordering or something). You could ask MySQL to do more job.

2/ You can use rails caching (actions, fragments ...)