Hi @tomsb,
The issue I’ve posted in slow-performance-with-large-vaults/16633 was about linking to other documents from the text area, and it is fixed in 0.12.3 for me. There is a small lag, but it’s less than 1s and barely noticable.
I’ve just tried searching for the in the sidebar search, and it was almost instant. Maybe it’s cached somewhow. Searching for "data structure" was a lot slower and took 4-5 seconds.