GPX-import and deletion of waypoints slower than in Locus 3

Since the GPX-import of Geocaches on my phone got stuck and I couldn't fix the problem, I had to reinstall Locus 4. After that I did some speedtests comparing Locus 4 and Locus 3 regarding importing a GPX-file containing 5000 Geocaches ("Duplicate check of Points" turned off in LM3 and LM4). After that, delete all 5000 Caches of the folder again.

Sadly Locus 4 is quite slower than Locus 3:
Import: 22s (LM4) instead of 14s (LM3)
Delete: 20s (LM4) instead of just 2s (LM3)

It seems that import+deletion speed got even slower in latest Betaversion v4.36.1.5 compared to Google Play's v4.36.1.0 (import: 22s instead of 17s, deletion 20s instead of 16s). And I noticed that LM4 during import shows about 11s just "Loading..." before import starts, LM3 instantly starts with import.