Disable freelist for macos

It's faster on my mac m1 without the freelist

ConflictSet.cpp

@@ -694,7 +694,12 @@ constexpr int getMaxCapacity(Node *self) {
                         self->partialKeyLen);
 }
 
+#ifdef __APPLE__
+// Disabling the free list altogether is faster on my mac m1
+constexpr int64_t kMaxFreeListBytes = 0;
+#else
 constexpr int64_t kMaxFreeListBytes = 1 << 20;
+#endif
 
 // Maintains a free list up to kMaxFreeListBytes. If the top element of the list
 // doesn't meet the capacity constraints, it's freed and a new node is allocated
@@ -729,6 +734,8 @@ template <class T> struct NodeAllocator {
   }
 
   void release(T *p) {
+    assume(p->partialKeyCapacity >= 0);
+    assume(freeListSize >= 0);
     if (freeListSize + sizeof(T) + p->partialKeyCapacity > kMaxFreeListBytes) {
       removeNode(p);
       return safe_free(p, sizeof(T) + p->partialKeyCapacity);