of the software task, those concerned with fashioning abstract conceptual structures of great complexity. I suggest: • Using rapid prototyping as part of a planned iteration in establishing software properties of this irreducible essence of modern software systems: complexity, conformity, changeability, and invisibility.”Complexity • Software entities are more complex for their size than perhaps no two parts are alike • The complexity of software is an essential property, not an accidental one • Descriptions of a software entity that abstract away its complexity often abstract away its essence

Services are organized in hash table • IPVS DNAT • conntrack/iptables SNAT • Pros • O(1) time complexity in control/data plane • Stably runs for two decades • Support rich scheduling algorithm • Cons

hundreds of thousands of requests per second with minimal overhead. Fast async/await reduces the complexity of writing asynchronous applications. Paired with Tokio's utilities and vibrant ecosystem, writing

remove_if(v.begin(), v.end(), pred); 🐞 • v.erase(remove_if(v.begin(), v.end(), pred)); 🐞 • Quadratic complexity vec.erase(iter) loop 🐞 • Invalidating iterators while looping 🐞 • Skipping elements while looping