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                            # React memo

在寫代碼時，我們經常會寫 renderXX，這時只要props有改變，每個組件都會rerender
![](https://img.kancloud.cn/04/4f/044f38f19432efc19b4d562362cc8d69_620x588.png)

可以寫成這樣，使用react.memo包一下，props傳進來的方式。
![](https://img.kancloud.cn/51/9a/519a2c6243518f74b10b18d60adc3c6f_1838x1462.png)

![](https://img.kancloud.cn/00/60/0060e7c28ae871c70e33db7d9cb8e73d_972x1116.png)


[react memo useMemo,useCallback性能優化]([https://blog.csdn.net/wuChiSha/article/details/107638689](https://blog.csdn.net/wuChiSha/article/details/107638689))
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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