getSetItemBytesOnce duplicate statistics bugs

[daoshenzzg]

getSetItemBytesOnce duplicate statistics bugs

func (c *jetCache) getSetItemBytesOnce(item *item) (b []byte, cached bool, err error) {
	if c.local != nil {
		b, ok := c.local.Get(item.key)
		if ok {
			c.statsHandler.IncrHit()
			c.statsHandler.IncrLocalHit()
			if bytes.Compare(b, notFoundPlaceholder) == 0 {
				return nil, true, c.errNotFound
			}
			return b, true, nil
		}
	}
        
        v, err, _ := c.group.Do(item.key, func() (any, error) {
		b, err := c.getBytes(item.Context(), item.key, item.skipLocal)
		if err == nil {
			cached = true
			return b, nil
                }
       }
      // ....
 
}

func (c *jetCache) getBytes(ctx context.Context, key string, skipLocal bool) ([]byte, error) {
	if !skipLocal && c.local != nil {
		b, ok := c.local.Get(key)
		if ok {
			c.statsHandler.IncrHit()
			c.statsHandler.IncrLocalHit()
			if bytes.Compare(b, notFoundPlaceholder) == 0 {
				return nil, c.errNotFound
			}
			return b, nil
		}
		c.statsHandler.IncrLocalMiss()
	}
}

[daoshenzzg]

没有bug。第一次查询，如果未命中，并未统计，第二次未命中才统计。