Add resource stats logging

util.go

@@ -0,0 +1,18 @@
+package main
+
+import "fmt"
+
+// https://programming.guide/go/formatting-byte-size-to-human-readable-format.html
+func FormatByteCount(b uint64) string {
+	const unit = 1024
+	if b < unit {
+		return fmt.Sprintf("%d B", b)
+	} else {
+		div, exp := int64(unit), 0
+		for n := b / unit; n >= unit; n /= unit {
+			div *= unit
+			exp++
+		}
+		return fmt.Sprintf("%.1f %ciB", float64(b)/float64(div), "KMGTPE"[exp])
+	}
+}