- Anki 26.05: ~ 140 s
- Anki 26.08b1: ~ 8 s
The difference appears to be impressive. For reference, I am currently using only 1 preset for my entire collection with around 1.5 million reviews.
(Interestingly, while optimizing almost never results in new parameters, this “new optimizer” found what it deems to be better parameters on the first run.)