GWT Developer Tips - Targeted Browsers, Fast StringMap

What I've learned from using Google Web Toolkit - When compiling to JavaScript for testing, modify your module XML file to build JavaScript for your targeted browser(s). To improve performance, use fast string map instead of the hash map if all your keys are strings.

Alex Moffat of Lombardi Software and creators of Lombardi Blueprint, a business process mapping tool built with Google Web Toolkit

Learn more about GWT at http://code.google.com/gwt