Rails Best Practices

Use render :collection Rails 3 when possible

Posted by hjuskewycz on July 29, 2010

In Rails 3, render :collection is much faster than looping over a collection and calling render :partial manually. Some initial benchmarking showed up to 3 times faster rendering when render :collection was used.

Thanks to Yehuda for this protip (sended via Twitter)

<< DRY your database.yml

abuse content_for >>

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Comments

Posted by eric on 2010-07-29T16:21:26Z

Of course even faster is to just inline the partial if that makes sense of the app. You really only need a partial if:

1. You are really going to re-use the inside of the loop elsewhere OR
2. If the inside of the loop is really complicated and putting it inside of the loop would make the code hard to read.

But if you are simply printing a row of a table why not just inline it. Fast and easy to understand.

Posted by reu on 2010-08-19T23:49:58Z

Just adding <%= render @items %> is the shortcut for <%= render :partial => "items/item", :collection => @items %>

Use render :collection Rails 3 when possible

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