[no-ci] clarifying comment

primitives/benches/advz.rs

@@ -38,12 +38,17 @@ mod feature_gated {
         <<H as OutputSizeUser>::OutputSize as ArrayLength<u8>>::ArrayType: Copy,
     {
         // play with these items
-        const RATE: usize = 4; // ratio of num_storage_nodes : polynomial_degree
+        //
+        // CODE_RATE is merely a convenient way to automatically choose polynomial
+        // degree as a function of storage node count.
+        // If desired, you could set polynomial degrees independent of storage node
+        // count.
+        const CODE_RATE: usize = 4; // ratio of num_storage_nodes : polynomial_degree
         let storage_node_counts = [512, 1024];
         let payload_byte_lens = [1 * MB];
 
         // more items as a function of the above
-        let poly_degrees_iter = storage_node_counts.iter().map(|c| c / RATE);
+        let poly_degrees_iter = storage_node_counts.iter().map(|c| c / CODE_RATE);
         let supported_degree = poly_degrees_iter.clone().max().unwrap();
         let vid_sizes_iter = poly_degrees_iter.zip(storage_node_counts);
         let mut rng = jf_utils::test_rng();