write barriers

Write barriers are mechanisms used in computing, particularly in garbage collection and memory management, to track changes made to objects in memory. When a program modifies an object, the write barrier records this change, ensuring that the memory management system is aware of it. This helps prevent issues like memory leaks and keeps the system efficient by ensuring that resources are properly reclaimed when no longer needed. Essentially, write barriers act like a safety net that ensures the computer can effectively manage and clean up memory as needed, maintaining overall system health.