message: Added bench info in README
diff: @@ -27,6 +27,14 @@ to build such a search engine.
  Tantivy is, in fact, strongly inspired by Lucene's design.
  +# Benchmark
  +
  +Tantivy is typically faster than Lucene, but the results will depend on
  +the nature of the queries in your workload.
  +
  +The following [benchmark](https://tantivy-search.github.io/bench/) break downs
  +performance for different type of queries / collection.
  +
  # Features
  - Full-text search
  