I want to use BM25, like rank_bm25 package. But it seems that default group of QueryParser need all words appear, which is different with tranditional BM25. So I use OrGroup, but it's really slow, even slower than rank_bm25 package.

[fengshansi]

Well, I just want to find a package faster than rank_bm25 package, but whoosh's QueryParser("content", self.index.schema) seems not the tranditional BM25. When I use QueryParser("content", self.index.schema, group=OrGroup.factory()), it is so slow, even slower than rank_bm25.
I just want to use BM25 like rank_bm25 and want faster speed. Is my usage of whoosh wrong?