Profiling and Reducing App Launch Time
Slow launch is a top complaint in legacy iOS apps. This lesson shows how to profile cold and warm launches and systematically trim startup cost in Objective-C codebases.
Cold vs Warm Launch
A cold launch starts the process from scratch; a warm launch resumes a suspended process. Cold launches are slowest and most visible to users.
The Launch Budget
Apple recommends launching in under 400ms of pre-main plus main work where possible. Treat launch time as a budget you must not exceed.
All lessons in this course
- Detecting Memory Leaks with Instruments
- Optimizing UI Rendering and Responsiveness
- Advanced Debugging Techniques
- Profiling and Reducing App Launch Time