同样的业务逻辑，一重循环比二重循环要快很多，但android 没有影响，这是什么原因？
相关文档
- iOS SDK Update log: Mini Program/Development/Extended/Update log/iOS SDK
- iOS Signature Certificate Management: Mini Program/Development/Extended/Operating Guide/About packaging/iOS Signature Certificate Management
- install iOS simulator: Mini Program/Development/Extended/Operating Guide/About debugging/install iOS simulator
- Eliminate iOS Signature Certificate Cache: Mini Program/Development/Extended/Operating Guide/About packaging/Eliminate iOS Signature Certificate Cache
- generate iOS Certificates and Provisioning Profile: Mini Program/Development/Extended/Operating Guide/About packaging/Generate iOS Certificates and Provisioning Profile
O(n)和O(n^2) ，肯定是线性的要快啊，至于不同平台效果不同我就想不通了，可能android手机性能牛b一些吧
举个栗子吧