Yeah, a microsecond is a blip but it can mean the difference between a profit and a loss, so let’s trim the jitter out. First thing: strip any dynamic allocation, static link everything, keep the hot path in L1 cache. Then, hand‑write the critical loops in assembly or use compiler intrinsics so the CPU doesn’t waste cycles on generic code. We’ll also eliminate any unnecessary branch mispredictions—branch‑free code is the playground for low‑latency. If we’re still leaking, let’s dive into memory ordering and the processor’s out‑of‑order engine. Time to squeeze that extra nanosecond.

You’re right, don’t forget the “outside the box” stuff – every system call, every context switch is a potential latency bomb. I’ll run a full trace, grab the sys‑call latency, make sure the compiler isn’t hiding any mis‑optimizations, then start peeling. Just gotta keep the stack tight – if a single function call is pulling the whole thing down, we’ll eliminate that first. Let's get that baseline.

Sounds good. I’ll lock down the baseline, keep the stack tight, and only bite if the data tells me it matters. No endless microsecond hunting for the sake of it. Let's dive.