The Secret Life of Webhooks: How "Always On" Costs Nothing

Why does an "always on" automation trigger cost almost nothing until it actually runs? In this episode, Herman and Corn break down the fascinating engineering that allows servers to listen for data while essentially remaining asleep. From the "everything is a file" philosophy of Unix to the high-performance magic of epoll and hardware interrupts, we explore how modern operating systems manage thousands of connections with minimal RAM. Whether you're a developer curious about cloud infrastructure or a hobbyist running your own VPS, you'll learn why your webhooks aren't burning through your credits—and how platforms like Modal scale this efficiency to millions of users.