A while ago I made the scenProc step to split the features in the correct grid faster by using multiple threads. I have now updated almost all of the steps to use multiple threads and process the features in parallel. So this should reduce the time needed to process bigger areas quite a bit. Especially on current multi-core computers running in multiple threads should speed things up quite a bit.
The only exception to this is that the steps to import data from file still use on thread, since there is only one file to read.
These changes will be available in the next development release.