How I Boosted Concurrency 40x with asyncio — and Ops Thought We Were DDoSed

Last month, the product manager cornered me in the break room and fired off: “The dashboard timed out again. Can we please stop making the boss sit there refreshing?” At the time, our metrics sync script took 11 minutes to run — 200 third‑party APIs called one after another, the logs filled with line after line of “waiting for response.” I didn’t bother explaining. I just went back to my desk, opened the editor, and thought: this thing has to go async. A week later the rewrite went live. Same 20