Gwt 2.5 super dev mode takes to much time

I'm trying it on a small project (300k LOC - 1033 java files + 367 ui files + 67 GWT-RPC services) and takes 539785 ms to compile every time I hit the compile button. The old dev mode takes less than 5s to refesh the page.

Compiling module pt.ipb.rad.RAD

   Compiling 1 permutation

      Compiling permutation 0...

      Source Maps Enabled

   Compile of permutations succeeded

Linking into /tmp/gwt-codeserver-857158151847711909.tmp/pt.ipb.rad.RAD/compile-1/war/rad; Writing extras to /tmp/gwt-codeserver-857158151847711909.tmp/pt.ipb.rad.RAD/compile-1/extras/rad

   Link succeeded

   Compilation succeeded -- 538.911s

Compile completed in 539785 ms

Fedora 17 x86_64, core i7, 8GB RAM

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