Rails Best Practices -

rolling out with feature flags

02 Sep 2012

Richard Huang

Sometimes you may face the situation that some features will be released, but you are not sure if it is friendly to end user, or if it will lead to performance issues, at that time you should use what we called "feature flags" Read More

Tags performance

Optimize db migration

30 Oct 2011

Richard Huang

rails migration provides a convenient way to alter database structure, you can easily add, change and drop column to a existing table, but when the data in existing table are huge, it will take a long time to alter existing table, you should try to merge/optimize the db alter sql statements. Read More

Tags migration performance

Active Record Query Interface Optimization

23 Jun 2011

Angelo Capilleri

Use select with has_many and belongs_to on Active Record Associations Read More

Tags refactor model performance

Use memoization

22 Nov 2010

Richard Huang

Memoization is an optimization technique used primarily to speed up computer programs by having function calls avoid repeating the calculation of results for previously-processed inputs. In rails, you can easily use memoize which is inherited from ActiveSupport::Memoizable. Read More

Tags performance

Select specific fields for performance

19 Oct 2010

Richard Huang

In a system like forum, the title and body is displayed on show page, but only title is on index page. You should use select in query to speed up the query and save memory. Read More

Tags performance query

Use batched finder for large data query

09 Sep 2010

Richard Huang

If you want to do a large data query such as finding all the 10,000,000 users to send email to them, you should use batched finder to avoid eating too much memory. Read More

Tags model performance task

Put scripts at the bottom

30 Aug 2010

Richard Huang

Do you experience that your website renders slow due to loading a lot of javascripts, especially loading some third-party javascripts? Move script tags to the bottom of body can speed up the render of your website. Read More

Tags view performance assets javascript

Use css sprite automatically

15 Aug 2010

Richard Huang

Using css sprite can reduce a large number of http requests, so it makes the web page loaded much faster. It it painful to composite a lot of images manually, do it automatically. Read More

Tags plugin performance css sprite convention assets

Use asset_host for production server

31 Jul 2010

Richard Huang

Use asset host for cookie-free domains for components, that make your components load faster. Read More

Tags performance assets