When loading generative artwork - Affinity Designer slows down to unbearable levels even with relatively easy meshes
This problem seems to exist on all platforms affinity runs on - which leads me to believe basic acceleration structures are not in place.
Example file: https://tilings.math.uni-bielefeld.de/img/substitution/danzers-7-fold/patch.pdf
Import this, try select all/ungroup/do anything to it -> framerate down to 1fps even on the beefiest of workstations
Same issue can be recreated by creating any shape and copying it about 100 times.