benchmark

version(showAssertTags) dbg();
   struct S { int x; }

   alias Key = S;
   auto set = radixTreeSet!(Key);

   assert(!set.contains(S(43)));

   assert(set.insert(S(43)));
   assert(set.contains(S(43)));

   assert(!set.insert(S(43)));
   assert(set.contains(S(43)));

version(showAssertTags) dbg();
   // alias Key = string;
   // alias Value = Array!int;
   // RadixTreeMapGrowOnly!(Key, Value) map;