This Week In Rust: This Week in Rust 664

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        , a crate for efficiently displaying the items of an iterator without temporary allocations.

        
        

        Thanks to !

        
        

        ,
        or
        if you would like your feature to be tracked as a part of this list.

        
        

        
        

        Always wanted to contribute to open-source projects but did not know where to start?
        Every week we highlight some tasks from the Rust community for you to pick and get started!

        
        

        Some of these tasks may also have mentors available, visit the task page for more information.

        
        
        
        
        
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          Are you a new or experienced speaker looking for a place to share something cool? This section highlights events that are being planned and are accepting submissions to join their event as a speaker.

          
          
          
          
          

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          698 pull requests were
          

          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
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            Summary:

            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            

            (instructions:u)	mean	range	count
            Regressions ❌ (primary)	4.6%	[0.2%, 12.8%]	24
            Regressions ❌ (secondary)	4.3%	[0.2%, 14.3%]	30
            Improvements ✅ (primary)	-3.3%	[-16.4%, -0.2%]	251
            Improvements ✅ (secondary)	-5.2%	[-34.8%, -0.2%]	308
            All ❌✅ (primary)	-2.6%	[-16.4%, 12.8%]	275

            
            

            1 Regression, 4 Improvements, 7 Mixed; 5 of them in rollups
            25 artifact comparisons made in total

            
            

            . These
            are the RFCs that were approved for implementation this week:

            
            

            
            
            
            

            
            

            announces the 'final comment period' for RFCs and key PRs
            which are reaching a decision. Express your opinions now.

            
            

          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
          
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        

        No Items entered Final Comment Period this week for
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      • 2026-08-13 | Virtual (Berlin, DE) |
      
      
      
      
    
    
    • 2026-08-13 | Virtual (Nürnberg, DE) |
    
    
    
    
  
  
  • 2026-08-14 | Virtual (Girona, ES) |
  
  
  
  


• 2026-08-16 | Virtual (Bangalore, IN) |