add sample output

docs/source/contributor-guide/profiling_native_code.md

@@ -19,14 +19,14 @@ under the License.
 
 # Profiling Native Code
 
-We use `cargo bench` to run benchmarks to measure the performance of individual operators and expressions 
+We use `cargo bench` to run benchmarks to measure the performance of individual operators and expressions
 and [cargo-flamegraph](https://github.com/flamegraph-rs/flamegraph) for profiling.
 
 ## Running micro benchmarks with cargo bench
 
 When implementing a new operator or expression, it is good practice to add a new microbenchmark under `core/benches`.
 
-It is often easiest to copy an existing benchmark and modify it for the new operator or expression. It is also 
+It is often easiest to copy an existing benchmark and modify it for the new operator or expression. It is also
 necessary to add a new section to the `Cargo.toml` file, such as:
 
 ```toml
@@ -35,7 +35,7 @@ name = "shuffle_writer"
 harness = false
 ```
 
-These benchmarks are useful when for comparing performance between releases or between feature branches and the 
+These benchmarks are useful when for comparing performance between releases or between feature branches and the
 main branch to help prevent regressions in performance when adding new features or fixing bugs.
 
 Individual benchmarks can be run by name with the following command.
@@ -44,6 +44,18 @@ Individual benchmarks can be run by name with the following command.
 cargo bench shuffle_writer
 ```
 
+Here is some sample output from running this command.
+
+```
+     Running benches/shuffle_writer.rs (target/release/deps/shuffle_writer-e37b59e37879cce7)
+Gnuplot not found, using plotters backend
+shuffle_writer/shuffle_writer
+                        time:   [2.0880 ms 2.0989 ms 2.1118 ms]
+Found 9 outliers among 100 measurements (9.00%)
+  3 (3.00%) high mild
+  6 (6.00%) high severe
+```
+
 ## Profiling with cargo-flamegraph
 
 Install cargo-flamegraph:
@@ -52,7 +64,8 @@ Install cargo-flamegraph:
 cargo install flamegraph
 ```
 
-Follow the instructions in https://github.com/flamegraph-rs/flamegraph for your platform for running flamegraph.
+Follow the instructions in [cargo-flamegraph](https://github.com/flamegraph-rs/flamegraph) for your platform for
+running flamegraph.
 
 Here is a sample command for running `cargo-flamegraph` on MacOS.
 
@@ -78,4 +91,4 @@ The generated flamegraph can now be opened in a browser that supports svg format
 
 Here is the flamegraph for this example:
 
-![flamegraph](../_static/images/flamegraph.png)
+![flamegraph](../_static/images/flamegraph.png)