Why We Bet on Rust to Supercharge Feature Store at Agoda
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Agoda migrated their Feature Store Serving component from Scala to Rust to address latency issues and scaling bottlenecks. Despite having no prior Rust experience, the team completed a proof of concept in one week using AI tools and the Rust compiler. After migration, they achieved 84% cost reduction while handling 5x more traffic, with CPU usage at 40% and memory at 15% of previous Scala levels. Shadow testing validated correctness before production deployment. The migration demonstrates how Rust's performance characteristics and modern tooling can enable teams to overcome JVM limitations in high-throughput, latency-sensitive systems.
