docs: Add identifier stem example, add more speed results (#35)

Author: Pringled

README.md

@@ -123,7 +123,7 @@ After fusing, results are reranked with a set of code-aware signals:
 
 - **Adaptive weighting.** Symbol-like queries (`Foo::bar`, `_private`, `getUserById`) get more lexical weight, while natural-language queries stay balanced between semantic and lexical retrievers.
 - **Definition boosts.** A chunk that defines the queried symbol (a `class`, `def`, `func`, etc.) is ranked above chunks that merely reference it.
-- **Identifier stems.** Query tokens matching identifier stems in a chunk receive an additional weight.
+- **Identifier stems.** Query tokens are stemmed and matched against identifier stems in a chunk, giving an additional weight to chunks that contain them. For example, querying `parse config` boosts chunks containing `parseConfig`, `ConfigParser`, or `config_parser`.
 - **File coherence.** When multiple chunks from the same file match the query, the file is boosted so the top result reflects broad file-level relevance rather than a single out-of-context chunk.
 - **Noise penalties.** Test files, `compat/`/`legacy/` shims, example code, and `.d.ts` declaration stubs are down-ranked so canonical implementations surface first.