Appendix E — Command cheat sheet

go run .                          # compile + run, no binary kept
go build -o bin/app .             # produce a binary
go test ./...                     # run all tests
go test -race ./...               # run all tests with the race detector
go test -bench=. -benchmem ./...  # run benchmarks with allocation stats
go test -cover ./...              # coverage percentage
go vet ./...                      # static correctness checks
gofmt -l .                        # list files that need formatting
go mod tidy                       # sync go.mod/go.sum with actual imports
GOOS=linux GOARCH=amd64 go build  # cross-compile
go tool pprof <profile>           # analyze a CPU/heap/goroutine profile
go tool trace <trace.out>         # analyze a scheduler trace