Use SQLITE_OPEN_NOMUTEX

components/sqlite3/db.cpp

@@ -16,7 +16,10 @@ namespace Sqlite3
     Db makeDb(std::string_view path, const char* schema)
     {
         sqlite3* handle = nullptr;
-        const int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
+        // All uses of NavMeshDb are protected by a mutex (navmeshtool) or serialized in a single thread (DbWorker)
+        // so additional synchronization between threads is not required and SQLITE_OPEN_NOMUTEX can be used.
+        // This is unsafe to use NavMeshDb without external synchronization because of internal state.
+        const int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_NOMUTEX;
         if (const int ec = sqlite3_open_v2(std::string(path).c_str(), &handle, flags, nullptr); ec != SQLITE_OK)
         {
             const std::string message(sqlite3_errmsg(handle));