fixup: readme

Signed-off-by: Todd Baert <[email protected]>

Author: toddbaert

CONTRIBUTING.md

@@ -38,6 +38,8 @@ There is a small JMH benchmark suite for testing allocations that can be run wit
 mvn -P benchmark test-compile jmh:benchmark -Djmh.f=1  -Djmh.prof='dev.openfeature.sdk.benchmark.AllocationProfiler'
 ```
 
+If you are concerned about the repercussions of a change on memory usage, run this an compare the results to the committed. `benchmark.txt` file.
+
 ## Releasing
 
 See [releasing](./docs/release.md).