private void EnqueueTask()
 {
     for (int i = 0; i < Config.QueueSize; i++)
     {
         string key = $"Key_{i}";
         _cache.Set(key, new CacheItem {
             Value = i
         });
     }
 }
        public void SetDoubleSpeedTest()
        {
            _cache = new LruDictionary <string, CacheItem>(Config.QueueSize);

            for (int i = 0; i < Config.DoubleQueueSize; i++)
            {
                string key = $"Key_{i}";
                _cache.Set(key, new CacheItem {
                    Value = i
                });
            }
        }