mic92/macprof

Default invocation prints a bounded text summary to stdout — paste it back.

# What is process X doing? (one process, wall-clock, 5s)
macprof sample <pid|name> 5 -o -

# Where is CPU time going system-wide? (true on-CPU, needs Xcode CL tools)
macprof xctrace 5 -o -
macprof xctrace 5 --attach <pid|name> -o -

# What is everything blocked on? (wall-clock, all procs, needs sudo)
macprof spindump 5 -o - --keep-idle

# Files for the user to open interactively
macprof xctrace 10 -o cpu.speedscope.json   # → drop on https://speedscope.app
macprof spindump 10                          # → cwd: .folded + .speedscope.json

Pick sampler by question:

| question | command | | --------------------------------- | --------------- | | process hung / spinning, why? | sample <name> | | what's burning CPU right now? | xctrace | | system slow, who's blocking whom? | spindump |

Flags: -o - stdout summary · -o x.json speedscope · -o x.folded flamegraph · --keep-idle include blocked threads · --keep-raw keep raw report.

Pair with heap <pid> (object counts) and lsof -p <pid> (open files/dirs) when memory, not CPU, is the symptom.