Make your project great again
summary
Shows concrete, project-level ways to cut iOS app cold-start time: enable the Xcode iOS9 launch timing flag to find pre-main stalls (examples up to 8 seconds) and examine dyld stats that revealed ~150 dynamic libraries and multiple Swift runtimes that can multiply startup cost. Recommends practical fixes—remove duplicate dependencies, lazy-load heavy libraries, and convert frameworks to static libraries using updated dependency managers and build flags—compared against Apple’s 400 ms animation target and the 20 s system watchdog.
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chapters (12)
- 0:00Introduction
- 1:14iOS app launch requirements
- 3:02Measuring app launch time
- 7:00How iOS loads apps
- 10:55Virtual memory role
- 15:48Library types impact
- 19:46Switching to static libraries
- 22:21Optimizing build time
- 28:08Modules performance impact
- 30:16Practical launch tips
- 33:11Further learning
- 35:00Q&A
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