text: 
  
  TITLE
  Set num_beams=4 for all Helsinki-NLP models
  
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  5
  
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  Currently it is 6. Empirically, I tested 77 random models and num_beams=4 was about 50% faster and on average slightly higher BLEU (22.5 vs 22.4). 
  
  We also have @jorgtied 's approval for the change.
  On slack, he wrote
  
  >  Again, no systematic evaluation - more like a feeling. I had the impression that 1 or 2 is worse and I didn’t want to set 10 or 12 that I have seen otherwise, because it may slow down things quite substantially. If you make some more tests then let me know what you will find … Thanks!
  
  
  There are about 1300 affected model's, so this feels like the type of thing @patrickvonplaten 's script could do well.