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WIP mux improvements for 10.2.1 #5077

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@karknu karknu commented Feb 12, 2025

Description

reasonably detailed description of the pull request

Checklist

Quality

  • Commit sequence makes sense and have useful messages, see ref.
  • New tests are added and existing tests are updated.
  • Self-reviewed the PR.

Maintenance

  • Linked an issue or added the PR to the current sprint of ouroboros-network project.
  • Added labels.
  • Updated changelog files.
  • The documentation has been properly updated, see ref.

Lower level benchmark for reading and writing over Sockets.
Uses local TCP sockets over ephemeral ports.
Reading a Mux segment used to require at least two syscalls.
One two read the header and one to read the rest of the data.

This change reads up to RecvBuffer bytes into a buffer in one go and
then serves data from it.
Enforce at least 1 byte payload data per SDU.
Permit sending of multiple SDUs through a single call to sendMany for
Socket bearers
Bearers without vector IO support emulate it through multiple calls to
write.
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