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Use Cases

Particularly when running in VMs with mitigations (e.g those CPUs used at many popular cloud vendors...) syscalls can be rather expensive.

Attempted Solutions

N/A

Proposal

Use recvmmsg instead of recvfrom for udp message receiving for improved performance.

With some of our applications pushing 100k messages at peak per log message performance is very important.

References

Relates to my performance drive in #12451

Version

0.21.0