Mention how to run a specific benchmark

Jack O'Connor · Jack O'Connor · commit ccc340de9664 · 2025-08-13T22:01:15.000+01:00
diff --git a/benches/README.md b/benches/README.md
@@ -7,7 +7,14 @@ These are some files to determine performance of rustpython.
 Running `cargo bench` from the root of the repository will start the benchmarks. Once done there will be a graphical 
 report under `target/criterion/report/index.html` that you can use use to view the results.
 
-To view Python tracebacks during benchmarks, run `RUST_BACKTRACE=1 cargo bench`. You can also bench against a 
+`cargo bench` supports name matching to run a subset of the benchmarks. To
+run only the sort microbenchmark, you can run:
+
+```shell
+cargo bench sort
+```
+
+To view Python tracebacks during benchmarks, run `RUST_BACKTRACE=1 cargo bench`. You can also bench against a
 specific installed Python version by running:
 
 ```shell
