Thread safety for status updates, periodically minify

vm/operand.go

@@ -13,3 +13,14 @@ type Operand struct {
 	Reserved [3]byte
 	Value    uint64
 }
+
+func (opr *Operand) Copy() *Operand {
+	if opr == nil {
+		return nil
+	}
+
+	return &Operand{
+		Type:  opr.Type,
+		Value: opr.Value,
+	}
+}