Performance Optimization Techniques

What memory optimization pattern is shown here?

const cache = new WeakMap();

function getData(obj) {
  if (cache.has(obj)) {
    return cache.get(obj);
  }
  const data = computeExpensiveData(obj);
  cache.set(obj, data);
  return data;
}

Strong reference caching
Memory pooling
Weak reference caching
Weak reference caching provides benefits through: 1) Automatic cleanup of cache entries when objects are garbage collected, 2) Prevents memory leaks in long-running applications, 3) Efficient memory usage for object-keyed caches, 4) No need for manual cache invalidation, 5) Perfect for memoization with object keys, 6) Allows garbage collector to reclaim memory when needed, 7) Ideal for caching computed results tied to object lifecycles, 8) Better memory management in complex applications.
Reference counting

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