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                            [TOC]

## 總結
- 如果每次迭代的元素的內存占用很低，那么 for 和 range 的性能幾乎是一樣,如 []int
- 如一個包含很多屬性的 struct 結構體，那么 for 的性能將顯著地高于 range，有時候甚至會有上千倍的性能差異,如果使用 range，建議只迭代下標，通過下標訪問迭代值,就與for 性能類似


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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