java.lang.OutOfMemoryError: Java heap space
   at org.netbeans.modules.diff.builtin.provider.HuntDiff.diff(HuntDiff.java:95)
   at org.netbeans.modules.diff.builtin.provider.BuiltInDiffProvider.computeDiff(BuiltInDiffProvider.java:99)
   at org.netbeans.modules.versioning.ui.diff.DiffSidebar$RefreshDiffTask.computeDiff(DiffSidebar.java:940)
   at org.netbeans.modules.versioning.ui.diff.DiffSidebar$RefreshDiffTask.run(DiffSidebar.java:908)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)