Why Your a cloud provider Lambda Cold Starts Are 800ms Worse Than They Need to Be (And How We Slashed Them to 42ms in Production)
I shipped a payment webhook service at a fintech startup I worked at in early 2023 — Node.js 18.18.2, Lambda, us-east-1, 1024MB, no container image, just plain zip deployment. Customers started reporting “intermittent 3-second timeouts” during retry ...