Ignore profiler output
Optimize node loading by skipping unnecessary operations.
Clean up
Fix a bug where doubles would be saved as integers
Add a new text format for file persistence. 3-4 times faster than XML.
Use QHash instead of QMap in NodeIdMap to squeeze some performance gains
Add support for the new simple format to the Java Import Tool.
Ignore profiler output
Do not use a StringList for the node header when loading simple text.

This speeds up the process a bit.