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Reduce unnecessary tensor allocation in Adam and AdamW #5700
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           @ymwangg this syncfree adam was contributed by aws folks, do you guys want to review this pr?  | 
    
              
                    ymwangg
  
              
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LGTM. pytorch already has similar optimizations, thanks for the PR!
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           Thanks both!  | 
    
              
                    JackCaoG
  
              
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                    Oct 13, 2023 
                  
              
              
            
            
    
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* Reduce unnecessary tensor allocation in adam and adamw * fix lint
    
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* Reduce unnecessary tensor allocation in adam and adamw * fix lint
    
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* Reduce unnecessary tensor allocation in adam and adamw * fix lint
    
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* Reduce unnecessary tensor allocation in adam and adamw * fix lint
    
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* Reduce unnecessary tensor allocation in adam and adamw * fix lint
    
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* Reduce unnecessary tensor allocation in adam and adamw * fix lint
  
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This commit will reduce unnecessary tensor allocation in Adam and AdamW when
amsgradis False. cc @JackCaoG