https://RustRocket.rs -- Cloud Monk Losang Jinpa, Ph.D., MCSE / MCT, https://Rustaceans.rs, Full Stack Cloud Native Rust DevOps Engineer - Rocket Framework Rust Microservices on Kubernetes-AWS-Azure-GCP

“cold path - a segment of generated object code that is executed only rarely or in exceptional cases (e.g., code within a catch block); such exceptional code is sometimes relegated to physically separate locations in memory so as to eliminate any added runtime cost associated with its existence (e.g., zero-cost-exception model). noexcept Specifier (1103)” (EMCppSfe 2021)

Contrast with hot path.