Updated comments [skip ci]

src/hnsw.h

@@ -75,7 +75,10 @@
 #define HnswIsElementTuple(tup) ((tup)->type == HNSW_ELEMENT_TUPLE_TYPE)
 #define HnswIsNeighborTuple(tup) ((tup)->type == HNSW_NEIGHBOR_TUPLE_TYPE)
 
+/* 2 * M connections for ground layer */
 #define HnswGetLayerM(m, layer) (layer == 0 ? m * 2 : m)
+
+/* Optimal ML from paper */
 #define HnswGetMl(m) (1 / log(m))
 
 /* Ensure fits in uint8 */

src/hnswutils.c

@@ -7,7 +7,7 @@
 #include "vector.h"
 
 /*
- * Get the number of connection in the index
+ * Get the max number of connections in an upper layer for each element in the index
  */
 int
 HnswGetM(Relation index)