@@ -525,10 +525,12 @@ communications.
525525
526526### `-P, --profile`
527527
528−Enable profiling. Profiles will be saved to
529−`[pier]/.urb/put/profile/[now].txt`. This is useful for debugging and
530−development. Profiling hit counters in Hoon code specified with the `~$` rune
531−will be recorded here.
528+Enable profiling. Profiles will be saved to `[pier]/.urb/put/profile/[now].txt`.
529+This is useful for debugging and development. Profiling hit counters in Hoon
530+code specified with the `~$` rune will be recorded here.
531+
532+This runs a sampling profiler and produces custom output. Runtime cost metrics
533+are only calculated if the binary was built with `CPU_DEBUG`.
532534
533535- Undocked `urbit -P [pier]`
534536- Docked `[pier]/.run -P`