# iOS应用启动性能优化资料汇总 [WWDC](https://everettjf.github.io/2018/08/06/ios-launch-performance-collection/#wwdc) [文章](https://everettjf.github.io/2018/08/06/ios-launch-performance-collection/#%E6%96%87%E7%AB%A0) [工具](https://everettjf.github.io/2018/08/06/ios-launch-performance-collection/#%E5%B7%A5%E5%85%B7) [代码](https://everettjf.github.io/2018/08/06/ios-launch-performance-collection/#%E4%BB%A3%E7%A0%81) [偏门古董](https://everettjf.github.io/2018/08/06/ios-launch-performance-collection/#%E5%81%8F%E9%97%A8%E5%8F%A4%E8%91%A3) [书籍](https://everettjf.github.io/2018/08/06/ios-launch-performance-collection/#%E4%B9%A6%E7%B1%8D) [总结](https://everettjf.github.io/2018/08/06/ios-launch-performance-collection/#%E6%80%BB%E7%BB%93) 发现好资料就整理到这里，_随时更新，最后一次更新2018年8月6日_ # WWDC 1. Optimizing App Startup Time 必看官方资料，从底层到上层[https://developer.apple.com/videos/play/wwdc2016/406/](https://developer.apple.com/videos/play/wwdc2016/406/) 2. App Startup Time: Past, Present, and Future dyld层面的优化[https://developer.apple.com/videos/play/wwdc2017/413/](https://developer.apple.com/videos/play/wwdc2017/413/) 3. Optimizing I/O for Performance and Battery Life IO是启动性能的重要影响部分[https://developer.apple.com/videos/play/wwdc2016/719/](https://developer.apple.com/videos/play/wwdc2016/719/) 4. Practical Approaches to Great App Performance 现场一步一步解决性能问题[https://developer.apple.com/videos/play/wwdc2018/407/](https://developer.apple.com/videos/play/wwdc2018/407/) 5. Using Time Profiler in Instruments TimeProfiler是必备好帮手[https://developer.apple.com/videos/play/wwdc2016/418/](https://developer.apple.com/videos/play/wwdc2016/418/) 6. High Performance Auto Layout App首页如果是AutoLayout的，那么以后看来不是问题了[https://developer.apple.com/videos/play/wwdc2018/220/](https://developer.apple.com/videos/play/wwdc2018/220/) 7. Core Image: Performance, Prototyping, and Python 首页当然也有大量的图片，了解Core Image[https://developer.apple.com/videos/play/wwdc2018/719/](https://developer.apple.com/videos/play/wwdc2018/719/) # 文章 **以下文章仅仅是收集，各家之谈，不要全信，也不要反对，各有道理，学习思路即可。** 1. 即刻技术团队：iOS app 启动速度研究实践 地址[https://zhuanlan.zhihu.com/p/38183046?from=1086193010&wm=3333\_2001&weiboauthoruid=1690182120](https://zhuanlan.zhihu.com/p/38183046?from=1086193010&wm=3333_2001&weiboauthoruid=1690182120)学习思路。 2. iOS Dynamic Framework 对App启动时间影响实测 [https://www.jianshu.com/p/3263009e9228](https://www.jianshu.com/p/3263009e9228)动态库的测试。可知：启动过程中尽量不要加载动态库了。 3. Optimizing Facebook for iOS start time [https://code.fb.com/ios/optimizing-facebook-for-ios-start-time/](https://code.fb.com/ios/optimizing-facebook-for-ios-start-time/)Facebook的思路。虽然Facebook的启动很慢。 4. Bugly: iOS App 启动性能优化 [https://mp.weixin.qq.com/s/Kf3EbDIUuf0aWVT-UCEmbA](https://mp.weixin.qq.com/s/Kf3EbDIUuf0aWVT-UCEmbA)这篇文章最后透露了一个很给力的思路。强烈推荐仔细看文章最后。 5. 今日头条iOS客户端启动速度优化 [https://techblog.toutiao.com/2017/01/17/iosspeed/](https://techblog.toutiao.com/2017/01/17/iosspeed/)文章开头的信息很多，但减少代码量，貌似很难行得通。 6. 如何精确度量 iOS App 的启动时间 [https://www.jianshu.com/p/c14987eee107](https://www.jianshu.com/p/c14987eee107)文章的思路可参考。 7. 优化 App 的启动时间 [http://yulingtianxia.com/blog/2016/10/30/Optimizing-App-Startup-Time/](http://yulingtianxia.com/blog/2016/10/30/Optimizing-App-Startup-Time/)主要是对WWDC的笔记，但仍然很给力。南萧玉，北子棋。这篇文章就是南萧玉所作。 8. 手淘iOS性能优化探索 [https://github.com/izhangxb/GMTC/blob/master/%E5%85%A8%E7%90%83%E7%A7%BB%E5%8A%A8%E6%8A%80%E6%9C%AF%E5%A4%A7%E4%BC%9AGMTC%202017%20PPT/%E6%89%8B%E6%B7%98iOS%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96%E6%8E%A2%E7%B4%A2%20.pdf](https://github.com/izhangxb/GMTC/blob/master/%E5%85%A8%E7%90%83%E7%A7%BB%E5%8A%A8%E6%8A%80%E6%9C%AF%E5%A4%A7%E4%BC%9AGMTC%202017%20PPT/%E6%89%8B%E6%B7%98iOS%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96%E6%8E%A2%E7%B4%A2%20.pdf)这是GMTC 2017手机淘宝专家的技术分享，可以参考。 9. iOS应用启动性能优化\(1\)-premain [https://everettjf.github.io/2018/05/26/ios-app-launch-performance-part1/](https://everettjf.github.io/2018/05/26/ios-app-launch-performance-part1/)仅仅是pre-main阶段的思路。作者说有后续的文章，但很久没动静了，不知道在搞什么。 10. 一种 hook objective c +load 的方法 [https://everettjf.github.io/2017/01/06/a-method-of-hook-objective-c-load/](https://everettjf.github.io/2017/01/06/a-method-of-hook-objective-c-load/)这篇文章的hook比较麻烦，其实还可以参考上面的一篇文章[https://www.jianshu.com/p/c14987eee107](https://www.jianshu.com/p/c14987eee107)，这里有批量hook +load的代码。（未来我也有计划会把这些相关代码整理到一个repo中） 11. 一种 hook C++ static initializers 的方法 [https://everettjf.github.io/2017/02/06/a-method-of-hook-static-initializers/](https://everettjf.github.io/2017/02/06/a-method-of-hook-static-initializers/)这篇文章的hook方法，有较大的可能是我首创，强烈推荐。手淘的分享中也提了这个方法。 12. 一种延迟 premain code 的方法 [https://everettjf.github.io/2017/03/06/a-method-of-delay-premain-code/](https://everettjf.github.io/2017/03/06/a-method-of-delay-premain-code/)通过学习Facebook的App中特有的section（参考文章[https://everettjf.github.io/2016/08/20/facebook-explore-section-fbinjectable/](https://everettjf.github.io/2016/08/20/facebook-explore-section-fbinjectable/)），发现的一种思路。 # 工具 1. TimeProfiler 都知道是啥。 2. AppleTrace [https://github.com/everettjf/AppleTrace](https://github.com/everettjf/AppleTrace)使用 HookZz hook了objc\_msgSend，会有较大性能损耗，但可根据相对比例来知道大概的耗时占比。另外也手动定义开始结尾生成chrome tracing。 3. DTrace 只能用于模拟器。使用方法可参考这本书：Advanced Apple Debugging & Reverse Engineering[https://store.raywenderlich.com/products/advanced-apple-debugging-and-reverse-engineering](https://store.raywenderlich.com/products/advanced-apple-debugging-and-reverse-engineering) 4. Xcode 环境变量 DYLD\_PRINT\_STATISTIC 及其他类似环境变量[https://developer.apple.com/library/archive/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/LoggingDynamicLoaderEvents.html](https://developer.apple.com/library/archive/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/LoggingDynamicLoaderEvents.html) # 代码 1. FastImageCache [https://github.com/path/FastImageCache](https://github.com/path/FastImageCache)优化图片加载的速度。空间换时间。 # 偏门古董 1. Code Size Performance Guidelines [https://developer.apple.com/library/archive/documentation/Performance/Conceptual/CodeFootprint/Articles/MachOOverview.html](https://developer.apple.com/library/archive/documentation/Performance/Conceptual/CodeFootprint/Articles/MachOOverview.html)页面最下面提出的思路很好，但文章是gcc时代的了。有没有clang时代对应的呢。 Improving Locality of Reference[https://developer.apple.com/library/archive/documentation/Performance/Conceptual/CodeFootprint/Articles/ImprovingLocality.html\#//apple\_ref/doc/uid/20001862-CJBJFIDD](https://developer.apple.com/library/archive/documentation/Performance/Conceptual/CodeFootprint/Articles/ImprovingLocality.html#//apple_ref/doc/uid/20001862-CJBJFIDD) # 书籍 1. Pro iOS Apps Performance Optimization 貌似比较古老，仅参考。 2. iOS and macOS Performance Tuning 很细致，我正在看。有中文翻译版。 3. High Performance iOS Apps 有中文翻译版。 # 总结 上面的文章我都看过，或者至少是正在看，总结下来，辅助大家优化启动性能。 --- 转载于：https://everettjf.github.io/2018/08/06/ios-launch-performance-collection/