| // Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file | |
| // for details. All rights reserved. Use of this source code is governed by a | |
| // BSD-style license that can be found in the LICENSE file. | |
| import 'dart:developer'; | |
| fib(int n) { | |
| if (n <= 1) { | |
| return n; | |
| } | |
| return fib(n - 1) + fib(n - 2); | |
| } | |
| void main() { | |
| final tag = UserTag('Testing')..makeCurrent(); | |
| final tag2 = UserTag('Baz'); | |
| int i = 5; | |
| while (true) { | |
| tag.makeCurrent(); | |
| ++i; | |
| fib(i); | |
| tag2.makeCurrent(); | |
| fib(i); | |
| } | |
| } |