What causes dev mode to perform so incredibly slow?

Question

At the moment gwt development mode is extremely slow when preparing the page and while actually using my application. If i compile and run using runjettyrun everything works at a satisfactory speed but with gwt everything is very slow. I have tried forcing gwt to compile only for gecko1_8 but it's not much help. What else can i try?

Answer 1

Using the G1GC garbage collector made a big difference for me on OSX.

Answer 2

The dev mode is slow because your code is compiled on the fly by the code server.

Did you try to use super-dev-mode instead? With super-dev-mode, the code is compiled before you access it with only the permutation corresponding to the browser and locale you are using.