Add preprocessor macro GTL_DISABLE_MIX to disable hash mixing.

greg7mdp · Nov 2, 2024 · 1ec7500 · 1ec7500
1 parent e33ed00
commit 1ec7500
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/include/gtl/phmap.hpp b/include/gtl/phmap.hpp
@@ -2524,7 +2524,11 @@ class raw_hash_set {
     struct HashElement {
         template<class K, class... Args>
         size_t operator()(const K& key, Args&&...) const {
+#if GTL_DISABLE_MIX
+            return h(key);
+#else
             return phmap_mix<sizeof(size_t)>()(static_cast<size_t>(h(key)));
+#endif
         }
         const hasher& h;
     };
@@ -4313,7 +4317,11 @@ class parallel_hash_set {
     struct HashElement {
         template<class K, class... Args>
         size_t operator()(const K& key, Args&&...) const {
+#if GTL_DISABLE_MIX
+            return h(key);
+#else
             return phmap_mix<sizeof(size_t)>()(h(key));
+#endif
         }
         const hasher& h;
     };