# APM 内存泄露检测 各家都是基于 Facebook 的 FBRetainCycleDetector 实现，有： 腾讯 MLeaksFinder https://github.com/Tencent/MLeaksFinder PLeakSniffer https://github.com/music4kid/PLeakSniffer LeaksMonitor https://github.com/tripleCC/Laboratory/tree/master/LeaksMonitor ANR 检测 ANR 检测相对比较简单，各家原理基本相同。新建一个 thread 在 threshold 的间隔时间内（一般 200 - 400毫秒）循环等待一个 semaphore，并从主线程 async dispatch semaphore 的 signal 函数，如果超时则报卡顿。 1. https://gist.github.com/leilee/3275b94c381114332242978fc4366591 2. https://gist.github.com/Adlai-Holler/ea7e3e98333b3b84f13d19b169ccf989 1. https://gist.github.com/mikeash/5172803 这个是纯 GCD 的实现 2. https://gist.github.com/steipete/5664345 PFPDFKit 里用的是这个 3. https://gist.github.com/jspahrsummers/419266f5231832602bec GitHub 客户端里用的 4. https://github.com/wojteklu/Watchdog 这个有用 atomic_store 和 atomic_load 实现死锁回调 5. DoKit 8. https://github.com/ming1016/study/wiki/检测iOS的APP性能的一些方法 启动优化 《Reducing Your App's Launch Time》- Apple https://developer.apple.com/documentation/xcode/improving_your_app_s_performance/reducing_your_app_s_launch_time 《抖音研发实践：基于二进制文件重排的解决方案 APP启动速度提升超15%》 https://mp.weixin.qq.com/s?__biz=MzI1MzYzMjE0MQ==&mid=2247485101&idx=1&sn=abbbb6da1aba37a04047fc210363bcc9&scene=21#wechat_redirect // 这种纬度的启动时间优化对小公司来说 ROI 太低 《美团外卖 iOS App 冷启动治理》 https://tech.meituan.com/2018/12/06/waimai-ios-optimizing-startup.html 测量进程的 uptime https://github.com/tripleCC/Laboratory/blob/master/ProcessStartTime/ProcessStartTime/main.m https://stackoverflow.com/questions/40649964/ios-get-self-process-start-time-after-the-fact/40677286 滴滴出行 DoraemonKit https://github.com/didi/DoraemonKit 功能非常多，感觉侧重了 UI 的运行时调试。APM 的部分主要依赖第三方库，如 MLeakFinder。有提供问题上报机制，所以会有不少额外的网络请求发送到 dokit 的API。 腾讯 Matrix https://github.com/tencent/matrix 功能精简，只有 ANR 和内存检测。 美图秀秀 MTHawkeye https://github.com/meitu/MTHawkeye/tree/develop/MTHawkeye 监控项目比 DoKit 多，ANR 中能看到主线程堆栈信息，网络层有做一些基本优化指标的监控。 阿里巴巴 GodEye https://github.com/zixun/GodEye 项目已经三年没有维护，不过作者的小专栏有提供整体思路，值得参考学习。https://xiaozhuanlan.com/godeye # 技术博客 AloneMonkey http://www.alonemonkey.com/ https://github.com/AloneMonkey #ios #re yulingtianxia https://yulingtianxia.com/ https://github.com/yulingtianxia #ios #ml SatanWoo http://satanwoo.github.io/ https://github.com/SatanWoo #ios #ml Naville Zhang https://mayuyu.io/ https://github.com/Naville #ios #re #llvm Cocoa Oikawa https://blog.0xbbc.com/ https://github.com/BlueCocoa #ios jmpews https://jmpews.github.io https://github.com/jmpews #ios #re kov4l3nko https://kov4l3nko.github.io https://github.com/kov4l3nko #ios mikeash https://www.mikeash.com/pyblog/ #ios NSBLOGGING https://kandelvijaya.com/post/ #ios 4ch12dy http://4ch12dy.site/ https://github.com/4ch12dy ibireme https://blog.ibireme.com/ https://github.com/ibireme/ #ios bang http://blog.cnbang.net/ https://github.com/bang590 #ios everettjf https://everettjf.github.io/ https://github.com/everettjf #ios #re Gityuan http://gityuan.com/ #android #flutter Meituan https://tech.meituan.com/ #ios #android #company draveness https://draveness.me/ #ios #golang chy305chy https://chy305chy.github.io/ #ios Urinx https://urinx.github.io/v6/ https://github.com/Urinx #ios #re bdunagan http://bdunagan.com/ #ios la0s https://la0s.github.io/ #re #ios caijinglong https://www.kikt.top/ #flutter weishu http://weishu.me/ https://github.com/tiann #android #re zixia https://github.com/huan #ml #re xelz https://github.com/xelzmm http://xelz.info/ #re ChiChou https://github.com/ChiChou https://blog.chichou.me/ #re # 学习 # 资料 * 经典WWDC视频 [WWDC2016:Optimizing App Startup Time](https://developer.apple.com/videos/play/wwdc2016/406) [WWDC2016:Optimizing I/O for Performance and Battery Life](https://developer.apple.com/videos/play/wwdc2016/719/) [WWDC2017:App Startup Time: Past, Present, and Future](https://developer.apple.com/videos/play/wwdc2017/413/) * 图片的加载过程 [Core Image: Performance, Prototyping, and Python](https://developer.apple.com/videos/play/wwdc2018/719/) * Facebook的二进制优化，开拓思路 [通过优化二进制布局提升iOS启动性能](https://www.bilibili.com/video/BV1NJ411w7hv) # 文章 [如何对 iOS 启动阶段耗时进行分析](https://ming1016.github.io/2019/12/07/how-to-analyze-startup-time-cost-in-ios/) [objc_msgSend Hook 精简学习过程](https://linux.ctolib.com/czqasngit-objc_msgSend_hook.html) [如何对 iOS 启动阶段耗时进行分析](http://www.starming.com/2019/12/07/how-to-analyze-startup-time-cost-in-ios/) [App 启动速度怎么做优化与监控？](https://time.geekbang.org/column/article/85331) [监控所有的OC方法耗时](https://juejin.im/post/5d146490f265da1bc37f2065) [Hook objc_msgSend to hotfix](https://www.dazhuanlan.com/2019/10/18/5da8a4b2a7da7/) [iOS App启动优化（一）—— 了解App的启动流程](https://juejin.im/post/5da830a4e51d457805049817) [iOS App启动优化（二）—— 使用“Time Profiler”工具监控App的启动耗时](https://juejin.im/post/5dad6bfb6fb9a04de818fcb8) [iOS App启动优化（三）—— 自己做一个工具监控App的启动耗时](https://juejin.im/post/5de501e0e51d4540a15879ff) * facebook的启动优化（2015年的老文章） [Optimizing Facebook for iOS start time](https://engineering.fb.com/ios/optimizing-facebook-for-ios-start-time/) [优化 App 的启动时间](http://yulingtianxia.com/blog/2016/10/30/Optimizing-App-Startup-Time/#%E5%AE%89%E5%85%A8) [深入理解App的启动过程](https://github.com/LeoMobileDeveloper/Blogs/blob/master/iOS/What%20happened%20at%20startup%20time.md) [iOS启动速度优化](https://github.com/BiBoyang/BoyangBlog/blob/master/File/iOS_APM_03.md) [iOS app启动速度研究实践](https://zhuanlan.zhihu.com/p/38183046?from=1086193010&wm=3333_2001&weiboauthoruid=1690182120) [iOS Dynamic Framework 对App启动时间影响实测](https://www.jianshu.com/p/3263009e9228) [iOS App 启动性能优化](https://mp.weixin.qq.com/s/Kf3EbDIUuf0aWVT-UCEmbA) [今日头条iOS客户端启动速度优化](https://juejin.im/entry/5b6061bef265da0f574dfd21) [如何精确度量 iOS App 的启动时间](https://www.jianshu.com/p/c14987eee107) [ iOS App冷启动治理：来自美团外卖的实践 ](https://mp.weixin.qq.com/s/jN3jaNrvXczZoYIRCWZs7w)