Upgraded early this morning (5am). Been checking every so often on background audio analysis.
Core running on Mac Mini (2012, i5, 8Gb RAM, external USB3 SSD stores Roon database, external 2Tb USB3 drive stores music).
Initially, running on 1 core, was processing about less than 1,000 files per hour. Upped it to 4 cores (OSX Activity Monitor shows 380% processor usage). Now processing about 2,000 files per hour. Fortunately, Roon still plays OK (but stutters a bit on some 192K files).
With 100K files this is going to take about 2 days. Is that normal?