Comment by hbrucejohnson: It's in trunk as of r5032. The flag is -XdisableCastChecking. Let us know what you think.
http://code.google.com/p/google-web-toolkit/source/detail?r=5032 For more information: http://code.google.com/p/google-web-toolkit/wiki/NoCastCheckingOptimization --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/Google-Web-Toolkit-Contributors -~----------~----~----~----~------~----~------~--~---