diff --git a/src/GraphBLAS-sharp.Backend/Common/Common.fs b/src/GraphBLAS-sharp.Backend/Common/Common.fs
index afa9f871..c1481690 100644
--- a/src/GraphBLAS-sharp.Backend/Common/Common.fs
+++ b/src/GraphBLAS-sharp.Backend/Common/Common.fs
@@ -11,6 +11,7 @@ module Common =
             /// Sorts in-place input array of values by their 2d indices,
             /// which are stored in two given arrays of keys: rows and columns.
             /// When comparing, it first looks at rows, then columns.
+            /// Note that maximum possible workGroupSize is used internally for better perfomance.
             /// </summary>
             /// <example>
             /// <code>