Improving JavaScript performance

Application Developer's Guide

Keep the following tips in mind while creating your JavaScript to improve the performance of your code:

Always use the var statement to access variables.

For example, var message = "HELLO";

Always define JavaScript arrays to be of specific size, or with a list of initial elements.

For example, var s_objs = new Array(10);

Avoid using the eval and new functions.

Avoid using the with statement.

Always specify classes with a fully qualified name. Use "Packages" keyword when using such classes. Refer to Invoking Java methods in JavaScript.