________________________________________________________________________

This file is part of Logtalk <https://logtalk.org/>  
SPDX-FileCopyrightText: 1998-2026 Paulo Moura <pmoura@logtalk.org>  
SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
________________________________________________________________________


% start by loading the tool:

| ?- {ports_profiler(loader)}.
...


% the tool requires that the applications to be profiled are compiled in
% debug mode as the port data is collected using debug hooks:

| ?- set_logtalk_flag(debug, on).
...


% load the application to be profiled:

| ?- {searching(loader)}.
...


% start profiling

| ?- ports_profiler::start.
...


% run a query:

| ?- miss_cann::initial_state(Initial), hill_climbing(16)::solve(miss_cann, Initial, Path, Cost), miss_cann::print_path(Path).
...


% print the collected profiling data:

| ?- ports_profiler::data.

-------------------------------------------------------------------------------------
Entity              Predicate          Fact  Rule  Call  Exit *Exit  Fail  Redo Error
-------------------------------------------------------------------------------------
miss_cann           goal_state/2          1     0    13     1     0    12     0     0
miss_cann           heuristic/2           0    15    15    15     0     0     0     0
miss_cann           initial_state/2       1     0     1     1     0     0     0     0
miss_cann           next_state/3          0    66    18     0    38    18    38     0
miss_cann           print_state/1         0    12    12    12     0     0     0     0
state_space         goal_state/1          0    13    13     1     0    12     0     0
state_space         initial_state/1       0     1     1     1     0     0     0     0
state_space         member_path/2         0   103   118    22     0    96     0     0
state_space         print_path/1          1    12    13    13     0     0     0     0
heuristic_search/1  solve/4               0     1     1     0     1     0     0     0
heuristic_search/1  threshold/1           0     1     1     1     0     0     0     0
hill_climbing/1     hill/7                0    25    13     0    12     1     0     0
hill_climbing/1     search/5              0     1     1     0     1     0     0     0
-------------------------------------------------------------------------------------


% focus on a single entity:

| ?- ports_profiler::data(miss_cann).

-----------------------------------------------------------------
Predicate          Fact  Rule  Call  Exit *Exit  Fail  Redo Error
-----------------------------------------------------------------
goal_state/2          1     0    13     1     0    12     0     0
heuristic/2           0    15    15    15     0     0     0     0
initial_state/2       1     0     1     1     0     0     0     0
next_state/3          0    66    18     0    38    18    38     0
print_state/1         0    12    12    12     0     0     0     0
-----------------------------------------------------------------


% focus on a single predicate:

| ?- ports_profiler::data(state_space, print_path/1).

-------------
Clause  Count  
-------------
     1      1
     2     12
-------------


% stop profiling

| ?- ports_profiler::stop.
...
