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Converting an ArrayList to Json Object

sangram nani

Joined: Nov 27, 2011
Posts: 21
My project is a struts2 webapplication with Hibernate3. The application response time is slow in few Actions, like viewing the complete list of member in a organization. Am a using an Arraylist to retrieve the list of members from a organization Table. If there are <10 records in a organization then the response page is fast, but if it exceeds more than 10 then the response is slow. Currently, we are just retrieving the list from Arraylist and then displaying results in JSP. Please suggest me, does converting the ArrayList to JSON object, and then using the JSON object results to display data in JSP's works faster or should i look for other alternative.
Stephan van Hulst

Joined: Sep 20, 2010
Posts: 3779

You should identify where the bottleneck is. Does the problem lie with generating the JSON, or retrieving the data or something else still? Write a couple of tests to figure out what part of the program you're not satisfied with.
Jayesh A Lalwani
Saloon Keeper

Joined: Jan 17, 2008
Posts: 2607

Generally, it;s not a good idea to retreive a lot of objects from the DB and send it over to the UI. You should have some sort of pagination in the UI that allows the user to see a few entities at a time.

However, the limit of 10 seems too low. You will have to investigate where the bottleneck is. Database queries? Java processing? Network? maybe the javascript that parses and displays the elements is too slow.
Consider Paul's rocket mass heater.
subject: Converting an ArrayList to Json Object