Instruments

Use

Launch Instruments from the CLI:

open /Applications/Xcode.app/Contents/Applications/Instruments.app

Profile with the Instruments CLI:

cd /Applications/Utilities
instruments -t "Allocations" -D ~/trace_file_name.trace path/to/profiled/app

Configuration option	Description
`-t template`	The name or path of the profiling template to use when analyzing your app.
`-s`	Returns a list of all installed profiling templates.
`-D document`	The path where the .trace document should be saved. If the file already exists, the newly recorded data is appended to it as a new run.
`-l #`	The amount of time to record, in milliseconds, before terminating. If not provided, recording occurs indefinitely, until the app is manually terminated.
`-i #`	The index of the instrument to use for recording.
`-p pid`	The process ID of the app to be recorded.
`application`	The path of the app to be recorded.
`-w hardware device`	The ID of the device to target.
`-e variable value`	An environment variable to be applied while profiling.
`argument`	A command-line argument to be passed to the app being profiled. Multiple arguments may be specified, if desired.
`-v`	Enables verbose logging while profiling.