HELP - Dorico extremely slow, becomes impossible to work

Appreciate it—tested this, and checked against this thread as well, where users list how long operations take for them:

For context I have been using the same cheap refurbished iMac since ~2019. (Have been unemployed and semi-homeless for most of that time so there have been bigger things on my mind than upgrading my computer.) Specs are fairly similar to @MilosBetko’s actually, although this was considered pretty low-end when I bought it.

Open file:

notifyPostCommandExecute: File.Open?File=/Users/Shared/Dorico Example Projects/Stravinsky-RiteOfSpring-I.dorico (53618 ms)

Condensing off:

notifyPostCommandExecute: Edit.ToggleLayoutCondensing?Set=false (15971 ms)

Condensing on:

notifyPostCommandExecute: Edit.ToggleLayoutCondensing?Set=true (23433 ms)

Transpose entire flow up:

notifyPostCommandExecute: NoteEdit.PitchUpOctave (11561 ms)

Switch to concert pitch:

notifyPostCommandExecute: Edit.ChangeLayoutTransposition?LayoutTransposition=kScoreInC (74130 ms)

People with powerful computers usually report times of 10-20 seconds for these operations, so there is a clear speed advantage for higher performance, but operations still seem to take longer than they would in e.g. my old copy of Sibelius 6, I assume because the program is vastly more complex.