Comment by kibork: First impression is that this really makes some performance boost. At least it's noticeable. I'll try to make some benchmarking and calculate absolute values.
For more information: http://code.google.com/p/google-web-toolkit/wiki/NoCastCheckingOptimization --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/Google-Web-Toolkit-Contributors -~----------~----~----~----~------~----~------~--~---