liyh

Try `bar.tick(0)` after declaring `bar` may be useful. And the code can be found [here](https://github.com/visionmedia/node-progress/blob/master/lib/node-progress.js#L79-L89)

编译慢的问题可以试试这个 [webpack-hot-middleware](https://github.com/glenjamin/webpack-hot-middleware#webpack-hot-middleware)，配合 `webpack-dev-middleware` 可以在文件改动时只编译相关的文件而不需要全部重新编译

感谢 @phaibin ，然后这里阈值 55 转换为百分比差不多为 22%