It's threaded, so it generally doesn't affect the main game performance much if at all...but it sure does take a long freaking time in large modpacks (which means that tooltips for newly discovered bonuses are not yet searchable for an extended time after discovery).

IF I can find a good way to only reload tooltips for items related to newly discovered bonuses, that would help vastly.

Alternatively, there may be a valid approach to doing the checks on search query. Maybe something like...

• Create my own cache of what has dynamic tooltips
• Do my own checks for whether the search query matches those tooltips
• Add the results to the JEI / HEI search results (without duplicate results, if that's a thing)