Adding execution time to kfxdump

Author: rupor-github

cmd/debug/kfxdump/main.go

@@ -9,6 +9,7 @@ import (
 	"slices"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/h2non/filetype"
 
@@ -30,6 +31,11 @@ func main() {
 		os.Exit(2)
 	}
 
+	defer func(startedAt time.Time) {
+		duration := time.Since(startedAt)
+		fmt.Fprintf(os.Stderr, "\nExecution time: %s\n", duration)
+	}(time.Now())
+
 	path := flag.Arg(0)
 	b, err := os.ReadFile(path)
 	if err != nil {