Found good resources, organize here, updated anytime, last update August 19, 2018

WWDC

Optimizing App Startup Time

Must-see official resource, from low-level to high-level https://developer.apple.com/videos/play/wwdc2016/406/
App Startup Time: Past, Present, and Future

dyld-level optimization https://developer.apple.com/videos/play/wwdc2017/413/
Optimizing I/O for Performance and Battery Life

IO is important impact part of startup performance https://developer.apple.com/videos/play/wwdc2016/719/
Practical Approaches to Great App Performance

On-site step by step solving performance problems https://developer.apple.com/videos/play/wwdc2018/407/
Using Time Profiler in Instruments

TimeProfiler is essential good helper https://developer.apple.com/videos/play/wwdc2016/418/
High Performance Auto Layout

If App home page uses AutoLayout, then in future seems not a problem https://developer.apple.com/videos/play/wwdc2018/220/
Core Image: Performance, Prototyping, and Python

Home page of course also has lots of images, understand Core Image https://developer.apple.com/videos/play/wwdc2018/719/

Articles

Below articles are just collection, various opinions, don’t fully believe, don’t oppose, each has reason, learn ideas.

Jike Tech Team: iOS app startup speed research practice

Address https://zhuanlan.zhihu.com/p/38183046?from=1086193010&wm=3333_2001&weiboauthoruid=1690182120 Learn ideas.
iOS Dynamic Framework Impact on App Startup Time Actual Test

https://www.jianshu.com/p/3263009e9228 Dynamic library testing. Can know: try not to load dynamic libraries during startup.
Optimizing Facebook for iOS start time

https://code.fb.com/ios/optimizing-facebook-for-ios-start-time/ Facebook’s ideas. Although Facebook’s startup is very slow.
Bugly: iOS App Launch Performance Optimization

https://mp.weixin.qq.com/s/Kf3EbDIUuf0aWVT-UCEmbA This article finally reveals a very powerful idea. Strongly recommend carefully reading article end.
Toutiao iOS Client Startup Speed Optimization

https://techblog.toutiao.com/2017/01/17/iosspeed/ Article beginning has lots of information, but reducing code amount, seems hard to implement.
How to Precisely Measure iOS App’s Startup Time

https://www.jianshu.com/p/c14987eee107 Article’s ideas can reference.
Optimizing App’s Startup Time

http://yulingtianxia.com/blog/2016/10/30/Optimizing-App-Startup-Time/ Mainly notes on WWDC, but still very powerful. South Xiaoyu, North Ziqi. This article is by South Xiaoyu.
Taobao iOS Performance Optimization Exploration

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 This is GMTC 2017 Taobao expert’s technical sharing, can reference.
iOS App Launch Performance Optimization (1) - premain

https://everettjf.github.io/2018/05/26/ios-app-launch-performance-part1/ Only premain stage ideas. Author says has follow-up articles, but no movement for long time, don’t know what’s going on.
Hook All +load Methods

A method to hook objective c +load https://everettjf.github.io/2017/01/06/a-method-of-hook-objective-c-load/

Hook All +load Methods (Including Category)

https://everettjf.github.io/2018/08/19/ios-hook-really-all-load/

A Method to Hook C++ Static Initializers

https://everettjf.github.io/2017/02/06/a-method-of-hook-static-initializers/ This article’s hook method, has high possibility I created it first, strongly recommend. Taobao’s sharing also mentioned this method.
A Method to Delay premain Code

https://everettjf.github.io/2017/03/06/a-method-of-delay-premain-code/ Through learning Facebook’s App’s unique section (reference article https://everettjf.github.io/2016/08/20/facebook-explore-section-fbinjectable/ ), discovered idea.

Tools

TimeProfiler

Everyone knows what it is.
AppleTrace

https://github.com/everettjf/AppleTrace Using HookZz hooked objc_msgSend, will have large performance cost, but can know approximate time consumption ratio based on relative proportion. Also manually define start and end to generate chrome tracing.
DTrace

Can only be used on simulator. Usage method can reference this book: Advanced Apple Debugging & Reverse Engineering https://store.raywenderlich.com/products/advanced-apple-debugging-and-reverse-engineering
Xcode Environment Variables

DYLD_PRINT_STATISTIC and other similar environment variables https://developer.apple.com/library/archive/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/LoggingDynamicLoaderEvents.html

Code

FastImageCache

https://github.com/path/FastImageCache Optimize image loading speed. Space for time.

Obscure Antiques

Code Size Performance Guidelines

https://developer.apple.com/library/archive/documentation/Performance/Conceptual/CodeFootprint/Articles/MachOOverview.html Page bottom’s ideas are good, but article is from gcc era. Is there corresponding for clang era? Improving Locality of Reference https://developer.apple.com/library/archive/documentation/Performance/Conceptual/CodeFootprint/Articles/ImprovingLocality.html#//apple_ref/doc/uid/20001862-CJBJFIDD

Books

Pro iOS Apps Performance Optimization

Seems relatively old, only reference.
iOS and macOS Performance Tuning

Very detailed, I’m reading. Has Chinese translation.
High Performance iOS Apps

Has Chinese translation.

Summary

Above articles I’ve all read, or at least reading, summarize here, assist everyone optimizing startup performance.