I have the same slow search and performance issue since 1.6.
Indexing new albums, SLOW. Searching for Album or Track, SLOW. When a song is playing and you try to play a next song or album a long wait until track starts playing.
Problem seems not a hardware or network related issue. Looks like Roon is not taking advantage of all possible resources eg CPU or RAM.
Before update to 1.6 when you activated Library | Background Audio Analysis Speed Fast you would see how it hurts the CPU and max it out. Now same setting not even bothers the CPU
CPU Intel Xeon D-1521 2.40GHz
Roon Roon Version 1.6 (build 416) stable (64bit)
1x Samsung SSD EVO 2TB Running Roon Core Installed on QNAP
8x 10TB 6Gbps SATA Drives Raid6
6x 6TB SATA Drives Raid5
Read Speed 103.2MB/s Read 110.4MB/s from Desktop to network folder where the songs are located
Albums 11685 | Tracks 129689
Roon Indexing files Fast (8Cores) and CPU used only 17% and Ram 18%
Ok possible network issue slowing it down ? Lets try another system.
Mac Pro Mojave 10.14.6
CPU Quad-Core Xeon E5 3.7 GHz
Roon Version 1.6 (build 416) stable (64bit)
Read Speed 783MB/s Read 939MB/s
Around 20000 tracks for testing stored local on SSD and access direct without possible network lag or potentially issues with external hard drives.
Same issue as above. Slow. No Tidal, Qobuz or Dropbox used. At this point even iTunes seems to respond quicker than Roon