PostCloudflare saved 100 TB of RAM with math and Rust 🔥

Cloudflare saved 100 TB of RAM with math and Rust 🔥 Cloudflare reclaimed more than 100 TB of RAM globally in a Pingora-based consistent-hashing service. No new hardware. The win came from changing data representation and the algorithms around it. ✅ Lessons: • Measure retained memory, not only allocation rate. • Check collection shape: duplicated keys, oversized buckets, and pointer-heavy graphs add up fast. • Fix the model first: a smaller or more compact structure usually beats micro-optimizing a hot loop. For high-cardinality caches, routing tables, or tenant maps, take a heap dump before reaching for another cache node. A few bytes per entry becomes expensive at fleet scale. [ Blog ] : https://blog.cloudflare.com/saving-100-tb-of-ram-with-math 〰️〰️〰️〰️〰️〰️ #Performance #Memory #Rust @ProgrammingTip