What is actually inside an iOS app sandbox
Documents, Library, Caches and tmp — what iOS backs up, what it deletes without asking, and why "the cache will not clear" is usually a directory choice.
PerformanceApp data3 min read
Measuring a mini-program's performance, not its host
A mini-program runs inside somebody else's app. What that does to your measurements, and how to attribute cost to the right process.