Go 1.27.3 compiler adds Profile-Guided Optimization

Profile-Guided Optimization (PGO) in Go uses CPU performance profiles to help the compiler optimize hot code paths without modifying source code. The Go compiler applies a trimmed call-graph profile to execute guarded devirtualization of interface calls, expand the inlining budget for hot call sites, and align loop headers on x86 architectures to improve cache efficiency. Open article →