Thread safety for status updates, periodically minify

vm/instruction.go

@@ -7,3 +7,15 @@ type Instruction struct {
 
 	opHandler opHandler `struc:"skip"`
 }
+
+func (instr *Instruction) Copy() *Instruction {
+	ret := &Instruction{
+		OpCode: instr.OpCode,
+	}
+
+	for i, opr := range instr.Operands {
+		ret.Operands[i] = opr.Copy()
+	}
+
+	return ret
+}