used EXFOs load_to_stardog test to validate new skiplist settings after flamegraph should long processing times on lookup

Author: matthewvon

memtable/inlineskiplist.h

@@ -72,8 +72,8 @@ class InlineSkipList {
   // in the allocator must remain allocated for the lifetime of the
   // skiplist object.
   explicit InlineSkipList(Comparator cmp, Allocator* allocator,
-                          int32_t max_height = 12,
-                          int32_t branching_factor = 4);
+                          int32_t max_height = 24,
+                          int32_t branching_factor = 2);
   // No copying allowed
   InlineSkipList(const InlineSkipList&) = delete;
   InlineSkipList& operator=(const InlineSkipList&) = delete;

memtable/skiplist.h

@@ -50,7 +50,7 @@ class SkipList {
   // and will allocate memory using "*allocator".  Objects allocated in the
   // allocator must remain allocated for the lifetime of the skiplist object.
   explicit SkipList(Comparator cmp, Allocator* allocator,
-                    int32_t max_height = 12, int32_t branching_factor = 4);
+                    int32_t max_height = 24, int32_t branching_factor = 2);
   // No copying allowed
   SkipList(const SkipList&) = delete;
   void operator=(const SkipList&) = delete;