Right. I found you are running on Windows after posting the comment. Makes sense, though there were some fixes in the latest Lucene I believe.

The Lucene's own benchmarks are at: https://home.apache.org/~mikemccand/lucenebench/ , though I admit to not know enough about benchmarking to form a strong opinion.

Either way, good luck with the project/service. More competition is always great. The open-source components look interesting too.