Go 1.21 brings language improvements, new standard library packages, PGO GA, backward and forward compatibility in the toolchain and faster builds.

GoLang is an open-source programming language developed by Google, known for its simplicity, concurrency support, and performance. Developers can learn about GoLang's syntax, standard library, and concurrency primitives to build efficient and scalable software applications for various domains.

Go 1.21 comes with a preview of the Profile Guided Optimization (PGO) feature we announced for preview in 1.20 is now generally available! If a file named is present in the main package’s directory, the command will use it to enable a PGO build.

Go 1.21 is released!