prolog_profile:profile/1

swipl
- library

profile(:Goal)

profile(:Goal, +Options)

Run once(Goal) under the execution profiler. If the (xpce) GUI is enabled this predicate is hooked by library(swi/pce_profile) and results are presented in a gui that enables navigating the call tree and jump to predicate implementations. Without the GUI, a simple textual report is generated. Defined options are:

time(Which): Profile cpu or wall time. The default is CPU time.
sample_rate(Rate): Samples per second, any numeric value between 1 and 1000. Default is defined by the Prolog flag profile_sample_rate, which defaults to 200.
ports(Bool): Specifies ports counted - true (all ports), false (call port only) or classic (all with some errors). Accomodates space/accuracy tradeoff building call tree. Default is defined by the Prolog flag profile_ports, which defaults to true.
top(N): When generating a textual report, show the top N predicates.
cumulative(Bool): If true (default false), show cumulative output in a textual report.

See also: - show_coverage/2 from library(test_cover).
To be done: - The textual input reflects only part of the information.