code: func (c *rankCache) BulkAdd(id uint64, n uint64) {
  	c.mu.Lock()
  	defer c.mu.Unlock()
  	if n < c.thresholdValue {
  		return
  	}
  
  	c.entries[id] = n
  }
docs: // BulkAdd adds a count to the cache unsorted. You should Invalidate after completion.