rga also indexes them when you search. To be honest I like that approach a lot more since it saves space and I generally know where I'm looking for things
ls -sh ~/.cache/rga/
total 336M
336M data.mdb 4.0K lock.mdb
That kind of caching is an interesting solution to incrementally building a database instead of spending hours up-front indexing. So the tool is ready for immediate use. Quite nifty :-)