The task manager ksysguard tells me that only one core is being occupied fully with enblend. Sometimes enblend hops between cores, but it is apparently not developed to distribute its work among more than one core (and I’ve got 8 cores resp. 16 threads):
So: Is there a multi-CPU version (or patch) of enblend? My current version is 4.2 (on an OpenSUSE Leap 15.1 system). Thank you.