This depends on what you are actually looking for, and how you are looking for it.
Do you really need pattern matching, or do you only look for fixed strings? Then other tools may be faster.
If you need case independent search on an upper- and lowercase data set, make a copy that is all upper or all lower, and search there.
If you only search in certain columns, make a copy that only includes these.
Or import the data into a database.
In politics and diplomacy, calling a decision “brave” has a very interesting meaning.