Porting our Django backend to Rust improved the infra usage by 90%
SMRTR summary
Wasmer rewrote their 7-year-old Django backend in Rust after it ballooned to 800 GB of RAM and 220 CPUs under normal load. The 3-month rewrite cut RAM by 92%, CPUs by 89%, and improved p95 API latency from 120ms to 30ms. Gains came from both Rust's efficiency and a cleaner architecture — and caching hasn't even been added yet.
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