I checked out Xapiand several months ago after I stumbled across it during a fit of Github browsing. It certainly seems fast and very easy to add documents but

I checked out Xapiand several months ago after I stumbled across it during a fit of Github browsing. It certainly seems fast and very easy to add documents but there is so little documentation that I was unable to test it out in any significant way. I'm very interested to see where the project goes, especially if Xapian itself switches away from the GPL.