From 3µs to 1ms: Benchmarking and Validating Low-Latency Pipelines

Got some really great responses on my last post thanks a lot to everyone who shared insights, it was super helpful.I’ve been benchmarking a simple pipeline locally and wanted to sanity check my numbers with people who’ve worked on real low-latency systems.

On an older Xeon, I’m seeing ~3 µs for basic feature computation, but when I include more complex indicators it jumps to ~1 ms. This seems to align with the idea that only O(1), cache-friendly logic fits in the µs regime.

A few questions:

• How do you properly benchmark end-to-end latency in practice (cycle counters, hardware timestamps, NIC-level?)
• What’s considered a reliable methodology vs misleading microbenchmarks?
• How do you separate compute vs networking latency cleanly?
• Any common mistakes people make when claiming “µs latency”?

Would really appreciate insights or any references/tools you’ve used in production