You mean my sample size of … 1 might not be statistically significant? LOL! Ok, here’s what I get with 5 channel change tests. PC is a 5950x with 128 GB RAM. Background processes are the same for all tests and no attempt was made to optimize the PC so all my usual stuff was open and running. All tests use the Modern Orchestra template and all times are in seconds as taken from the application.log files.
Dorico 3.5
HSSE+HSO (Pro) - 4.6, 4.5, 4.2, 4.1, 4.2
Average 4.32, high 4.6, low 4.1
VSL SYzd Special Edition Vol 1-4 PLUS - 3.1, 3.1, 3.4, 3.3, 3.5
Average 3.28, high 3.5, low 3.1
BBCSO Pro - 3.3, 3.6, 3.3, 3.5, 3.4
Average 3.42, high 3.6, low 3.1
Dorico 4.1
HSSE+HSO (Pro) - 6.7, 6.7, 6.3, 6.8, 6.3
Average 6.56, high 6.8, low 6.3
VSL SYzd Special Edition Vol 1-4 PLUS - 16.9, 17.1, 17.1, 17.2, 17.1
Average 17.08, high 17.2, low 16.9
BBCSO Pro - 27.7, 27.3, 27.7, 27.3, 27.7
Average 27.54, high 27.7, low 27.3
The most variance between tests was 0.5s so the times seem pretty consistent. In Dorico 3.5 all times for any library were under 5 seconds; in 4.1 all times for any library were over 6 seconds. In 3.5 the times were all pretty close, but HSSE+HSO (Pro) was actually the slowest library. In 4.1, it was by far the fastest and the times for different libraries varied by a lot.
I obviously have no idea what changed between 3.5 and 4.1 to cause this discrepancy, but a large library like BBCSO Pro takes 8 times as long to process a channel change in 4.1 than it did in 3.5. The library size seems to not be a factor in 3.5 but is a huge consideration in 4.1.
I’m not sure what other orchestral libraries others are using, but I would be curious if anyone else that has both 3.5 and 4.1 installed shows similar results.