Wednesday, October 27, 2010

JSON Optimizing for Faster Rendering

All web applications have fast rendering as one of the primary goals, JSON is a preferred choice in most of AJAX based applications because it is lightweight data interchange format.

Consider a scenario where you have to read data from database and render it on UI, typically the steps which will be followed are:

a. Send request data to server using AJAX calls
b. At server end invoke the Business layer
c. Business layer calls the database layer
d. Data returned from database layer is populated into business objects
e. From business objects build JSON objects, send them back to client
f. Client use Javascript libraries to render data on UI.

If everything works fine for you, you can stop reading right now, because you are achieving the required goal in the best way.

But in real world this might not be working for you because of performance issues at one or the other step mentioned above. Here are few performance tips, they might suite in some of the scenarios and might be the worst suggestion in other cases:

1. Store JSON objects in database, read them send them to UI. It will be the fastest Way but how to query, we need to build JSON object from our business objects before sending them to UI.

2. Store JSON objects in one of the columns in database, query on other columns and return the column containing the JSON Object.

These tips might be useful in some of the scenario's, also use JSON API's to add methods to generate JSON objects out of Java Objects.

Hope they might help you, might not help some of you.

Good Luck for faster UI's

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