tustvold commented on PR #8589:
URL: https://github.com/apache/arrow-rs/pull/8589#issuecomment-3395418152

   Is there some way we can avoid the quadratic codegen with code paths 
parameterized on both run end type and value type? Perhaps it'd be possible to 
identify where the transitions are, perhaps using the comparison kernels, and 
then use this to construct the indexes and a filter to construct the values 
array?
   
   


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