The Go Programming Language

Go 1.25 introduces container-aware GOMAXPROCS defaults that automatically adjust based on container CPU limits instead of total machine cores. This prevents CPU throttling in containerized environments, improves tail latency, and provides better out-of-the-box behavior for production workloads. The runtime now periodically checks and adjusts GOMAXPROCS when CPU limits change, while still allowing manual override through environment variables or runtime calls.