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Hi ,
When it says it will “avoid some checks and operations” this is due to unix domain sockets (UDS ) avoiding things related to the tcp/ip stack (headers, routing, ) – the kdb+ code itself is the same for both. Tcp/ip loopback interface has gotten more efficient over the years, so its always worth benchmarking your particular use-case against both.
UDS buffers do not auto-tune, unlike tcp, and whilst setting the send buffer size can impact performance, setting the recv buffer has no impact – neither of these are settable from within kdb+ yet. This can impact performance where large data sets (that exceed the uds send buffer size) are being transferred between otherwise busy processes.Hope this helps!
Thanks,
Megan