Hmmm. I'm skeptical. A Lucene term lookup is stupidly fast. It traverses an FST, which is small and probably in memory. Traversing the postings lists itself als

Hmmm. I'm skeptical. A Lucene term lookup is stupidly fast. It traverses an FST, which is small and probably in memory. Traversing the postings lists itself also needs to be smart by following a skip table, which is critical for performance.