Yes (it helped) and speed, i.e. querying and indexing performance, for sure is only an USP if you also have relevance.
I'm confident the relevance is as good as or better than Lucene. I especially like my phrase queries and how they seem more relevant compared to that of a Lucene phrase query. The scoring is a half-way implementation of word2vec (in a lot of ways similar to the scoring mechanics of Lucene's tf-idf scheme). I'm aiming for full word2vec implementation in vNext.
I have only my own benchmark tests to tell me I'm faster than Lucene. Which is why I'm contemplating writing a formal proof both of ResinDB's performance and of it's relevance.
My test data has been the English verison of Wikipedia plus Project Gutenberg. I suppose I could publish those indices to the world, as a demo search engine. I don't think a soul would care about a proper searchable Project Gutenberg though. Looking into common crawl now.
I'm a part-time father of two, employed doing tedious unmotivating work, focusing completely on my spare time project. I need some advise as to what the next step should be, if I wanted to make this into a business that I could spend all of my time with, not only nights and weekends. Formal proof? Demo?
Side note: one of the most approachable people in the database building community is Oren Eini, creator of RavenDB. He's reviewing ResinDB on his blog. I've read a preview of the entire series of posts, implemented solutions for the best parts of the critique and just released v2. Blog is here: http://ayende.com/blog