版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/perfbar/0.2.1/perfBar.css
- https://cdn.bootcdn.net/ajax/libs/perfbar/0.2.1/perfBar.min.css
- https://cdn.bootcdn.net/ajax/libs/perfbar/0.2.1/perfbar.js
- https://cdn.bootcdn.net/ajax/libs/perfbar/0.2.1/perfbar.min.js