diff --git a/docs/cudf/source/cudf_polars/index.rst b/docs/cudf/source/cudf_polars/index.rst
index 16dcde4b98a..ed0ad6836be 100644
--- a/docs/cudf/source/cudf_polars/index.rst
+++ b/docs/cudf/source/cudf_polars/index.rst
@@ -11,7 +11,7 @@ Benchmark
 ---------
 
 ````{note}
-Following benchmarks were performed with `POLARS_GPU_ENABLE_CUDA_MANAGED_MEMORY` environment variable set to `"0"`.
+The following benchmarks were performed with `POLARS_GPU_ENABLE_CUDA_MANAGED_MEMORY` environment variable set to `"0"`. Using managed memory (the default) imposes a performance cost in order to avoid out of memory errors. Peak performance can still be attained by setting the environment variable to 1.
 
 ```