I work in a regulatory environment and searching PDFs is increasingly important to find information quickly. Many of the PDFs are large, in the order or 200 pages or more.

In the current software, Adobe starts to look ahead after 2 or 3 characters are typed. This probably makes sense for a document that is say 10 pages long. But in a 200 page document it stalls the PC and messes up the search, for example if I'm searching for "thermometer" the PC gets stuck collecting all the words "the", "there", and anything else starting with "th" or "the". It's a ridiculous waste of PC resources as well as being annoying.

In fact, the only way I can search a word is to type it elsewhere and then paste it in the search box to avoid the look ahead while typing.

I have not found a way to disable this. Ideally the software would be able to tell if it is a large document and disable it automatically, and/or give priority to typing rather than the search, i.e. as a new letter is typed it starts the search again immediately, rather than completing the old search based on the first 2 or 3 letters.