document benchmark

Author: gms1

README.md

@@ -261,6 +261,8 @@ This compares `@homeofthings/sqlite3` against other popular SQLite drivers:
 - `better-sqlite3` - Synchronous, high-performance
 - `node:sqlite` - Built-in Node.js SQLite (v22.6.0+)
 
+See [tools/benchmark-drivers/README.md](tools/benchmark-drivers/README.md) for details.
+
 **Key insight**: Async drivers like `@homeofthings/sqlite3` show lower raw throughput but provide better event loop availability, allowing other operations to proceed concurrently. Sync drivers block the event loop completely.
 
 ## Internal Benchmarks
@@ -271,8 +273,6 @@ Internal performance benchmarks are available in `tools/benchmark-internal`:
 node tools/benchmark-internal/run.js
 ```
 
-See [tools/benchmark-drivers/README.md](tools/benchmark-drivers/README.md) for details.
-
 # Contributors
 
 * [Daniel Lockyer](https://github.com/daniellockyer)