lidavidm commented on pull request #12442:
URL: https://github.com/apache/arrow/pull/12442#issuecomment-1072551214


   Thanks @cyb70289!
   
   Note that there's some `#define` toggles in `ucx_internal.cc`. If you have 
an infiniband interface, I've found it's much faster with `#define 
ARROW_FLIGHT_UCX_SEND_CONTIG` uncommented. (However, on other transports, it's 
far far slower to have it uncommented.)


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