Not responding while using Filter Bar, Evaluator, and Script Columns

While playing with developing the EditQuickFilter script, I notice from time to time that Opus reacts a bit too slowly for its current task. It feels as if the Evaluator and the script columns (mostly the ExifTool Custom Columns) are playing hide-and-seek, occasionally with everybody waiting for the rest of the gang.

Sometimes the slowdown leads to Opus going into "not responding" mode. I am sending two crash logs from today and yesterday (Opus 13.4), and one recorded 12 days ago. The older one is special because it was created when Opus caused a huge drain of system resources while idling.