Apple Performance Tools
A source-mapped guide to Instruments, Xcode diagnostics, performance evidence, and choosing the right tool for the symptom.
Open performance guide →Apple platform study shelf
Two field guides, one quiet place.
Mobile-friendly access to the existing Apple performance tooling and macOS operating-system concepts guides, including the linked OS labs and exercise downloads.
macOS Operating-System Concepts
Processes, scheduling, synchronization, virtual memory, I/O, IPC, dynamic linking, and runnable interview labs.
Open OS concepts guide →