Levin

Didi Tech

Aug 24, 2019 · Backend Development

Levin: Didi's Open‑Source Solution for Fast Loading of Large Static Data

Levin, Didi’s open‑source GitHub project, uses shared‑memory containers and offline‑compiled binary layouts to mmap large, low‑frequency static datasets, cutting service cold‑start times from minutes to seconds, lowering memory overhead, simplifying version switches, and improving stability for high‑scale applications.