The Go programming language has released its first Release Candidate (RC) for version 1.21, which is packed with new features, improvements, and performance enhancements. This article provides an overview of the notable changes and features in Go 1.21, along with some exciting additions to the standard library.

• PGO
• min, max functions
• preview of loop capture change
• new slog, slices, and map packages
• WASI port