Fix VM memory allocation optimizations by reducing what we allocate on the heap

internal/compiler/compiler_test.go

@@ -1220,16 +1220,16 @@ func testConstants2(t *testing.T, expected []interface{}, actual []object.Object
 			)
 
 		case string:
-			assert.Equal(constant, actual[i].(*object.String).Value)
+			assert.Equal(constant, actual[i].(object.String).Value)
 
 		case int:
-			assert.Equal(int64(constant), actual[i].(*object.Integer).Value)
+			assert.Equal(int64(constant), actual[i].(object.Integer).Value)
 		}
 	}
 }
 
 func testIntegerObject(expected int64, actual object.Object) interface{} {
-	result, ok := actual.(*object.Integer)
+	result, ok := actual.(object.Integer)
 	if !ok {
 		return fmt.Errorf("object is not Integer. got=%T (%+v", actual, actual)
 	}
@@ -1242,7 +1242,7 @@ func testIntegerObject(expected int64, actual object.Object) interface{} {
 }
 
 func testStringObject(expected string, actual object.Object) error {
-	result, ok := actual.(*object.String)
+	result, ok := actual.(object.String)
 	if !ok {
 		return fmt.Errorf("object is not String. got %T (%+v", actual, actual)
 	}