Why Rust Beat Go for Uptimepage: No GC, Safer Concurrency

Developer Pavan built Uptimepage, an open-source uptime monitor and status page, choosing Rust over the more conventional Go for a specific technical reason. Because the tool's core promise is accurate millisecond-level timing, Go's garbage collector posed a risk of introducing random pauses that could distort reported metrics like p99 response times. Rust's lack of a garbage collector means memory is freed at predictable, developer-controlled points, eliminating hidden runtime delays from timing measurements. In load tests, the Rust-based service handled 50,000 concurrent checks while peaking at under one gigabyte of memory, with the live server idling at around 42 MiB. Beyond performance, Rust's compiler enforces safe concurrent access to shared data at compile time, preventing entire classes of data-race bugs that Go's tooling catches only optionally or at runtime.