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<?php
/**
* Copyright (c) 2010, Daniel Doezema
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The names of the contributors and/or copyright holder may not be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL DANIEL DOEZEMA BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
namespace Laradic\Support;
/**
* A light-weight class for quickly benchmarking/timing/profiling PHP code.
*
* @copyright Copyright (c) 2010 Daniel Doezema. (http://dan.doezema.com)
* @license http://dan.doezema.com/licenses/new-bsd New BSD License
*/
class Bench
{
/**
* Errors that occurred during request.
*
* @var array
*/
protected $errors = [ ];
/**
* Mark arrays.
*
* @var array
*/
protected $marks = [ ];
/**
* Microtime of when $this->start() was called.
*
* @var float
*/
protected $start = null;
/**
* Microtime of when $this->stop() was called.
*
* @var float
*/
protected $stop = null;
/**
* Start timer.
*
* @return void;
*/
public function start()
{
if ($this->start !== null) {
$this->logError('Please call ' . __CLASS__ . '::reset() before calling ' . __CLASS__ . '::start() again.');
return;
}
$this->start = microtime(true);
}
/**
* Stop timer.
*
* @return float; -> $this->getElapsed()
*/
public function stop()
{
if ($this->stop !== null) {
$this->logError('Please call ' . __CLASS__ . '::reset() before calling ' . __CLASS__ . '::stop() again.');
return;
}
$this->stop = microtime(true);
return $this->getElapsed();
}
/**
* Reset timer.
*
* @return void;
*/
public function reset()
{
$this->marks = [ ];
$this->start = null;
$this->stop = null;
}
/**
* Mark a point in time.
*
* @param string ; The id of the mark. (e.g., 'connection_start', 'connected_success', 'connection_fail');
*
* @return mixed; Float, the time in seconds since last mark, or if no marks $this->start) - false, on error.
*/
public function mark($id)
{
if ($this->start === null) {
$this->logError('Please call ' . __CLASS__ . '::start() before calling ' . __CLASS__ . '::mark("' . $id . '").');
return false;
}
$mark = [ ];
$mark[ 'id' ] = $id;
$mark[ 'microtime' ] = microtime(true);
$mark[ 'since_start' ] = $mark[ 'microtime' ] - $this->start;
$mark[ 'since_last_mark' ] = count($this->marks) ? ($mark[ 'microtime' ] - $this->marks[ count($this->marks) - 1 ][ 'microtime' ]) : $mark[ 'since_start' ];
$this->marks[] = $mark;
return $mark[ 'since_last_mark' ];
}
/**
* Get the marks array.
*
* @return array;
*/
public function getMarks()
{
return $this->marks;
}
/**
* Get a mark by its id.
*
* @param string ; The id of the existing mark.
*
* @return mixed; array on success, false on failure.
*/
public function getMarkById($id)
{
foreach ($this->marks as $mark) {
if ($mark[ 'id' ] == $id) {
return $mark;
}
}
return false;
}
/**
* Get average time (in seconds) between marks.
*
* @return mixed; float on success, false on failure.
*/
public function getMarkAverage()
{
if (($mark_count = count($marks = $this->getMarks()))) {
$sum = 0;
foreach ($marks as $mark) {
$sum += $mark[ 'since_last_mark' ];
}
return $sum / $mark_count;
}
return false;
}
/**
* Get the longest mark based on [since_last_mark].
*
* @return mixed; array on success, false on failure.
*/
public function getLongestMark()
{
if (count($marks = $this->getMarks())) {
$longest_mark = null;
foreach ($marks as $mark) {
if (($longest_mark == null) || ($mark[ 'since_last_mark' ] > $longest_mark[ 'since_last_mark' ])) {
$longest_mark = $mark;
}
}
return $longest_mark;
}
return false;
}
/**
* Get the shortest mark based on [since_last_mark].
*
* @return mixed; array on success, false on failure.
*/
public function getShortestMark()
{
if (count($marks = $this->getMarks())) {
$shortest_mark = null;
foreach ($marks as $mark) {
if (($shortest_mark == null) || ($mark[ 'since_last_mark' ] < $shortest_mark[ 'since_last_mark' ])) {
$shortest_mark = $mark;
}
}
return $shortest_mark;
}
return false;
}
/**
* Get the last/latest mark.
*
* @return mixed; array on success, false on failure.
*/
public function getLastMark()
{
if (count($this->marks)) {
return $this->marks[ count($this->marks) - 1 ];
}
return false;
}
/**
* Get the time (in seconds) elapsed since a specified mark.
*
* @param string ; The id of an existing mark.
*
* @return mixed; float, false on failure.
*/
public function getElaspedSinceMark($id)
{
if ($mark = $this->getMarkById($id)) {
return microtime(true) - $mark[ 'microtime' ];
}
return false;
}
/**
* Get the time (in seconds) elapsed since the last mark() call.
*
* @return mixed; float, false on error.
*/
public function getElaspedSinceLastMark()
{
if ($mark = $this->getLastMark()) {
return microtime(true) - $mark[ 'microtime' ];
}
return false;
}
/**
* Get the time elapsed (in seconds) based on context and/or parameters.
*
* getElapsed()
* if[stop() has been called] -- Time (in seconds() between start() and stop()
* else -- Time (in seconds) between start() and the getElapsed() call.
*
* getElapsed("from_mark_id", "to_mark_id") - Time (in seconds) between marks.
*
* @param mixed ;
* @param mixed ;
*
* @return mixed; float, false on error.
*/
public function getElapsed($from_mark_id = null, $to_mark_id = null)
{
$microtime = microtime(true);
$elapsed = false;
if ($this->start === null) {
$this->logError('Please call ' . __CLASS__ . '::start() before calling ' . __CLASS__ . '::getElapsed()');
return false;
}
if (!$from_mark_id && !$to_mark_id) {
$minuend = ($this->stop !== null) ? $this->stop : $microtime;
$elapsed = $minuend - $this->start;
} else {
if (($mark_from = $this->getMarkById($from_mark_id)) && ($mark_to = $this->getMarkById($to_mark_id))) {
$elapsed = abs($mark_to[ 'microtime' ] - $mark_from[ 'microtime' ]);
} else {
if (!$mark_from) {
$this->logError(__CLASS__ . '::getElapsed(): A mark with the id of "' . $from_mark_id . '" does not exist.');
}
if (!$mark_to) {
$this->logError(__CLASS__ . '::getElapsed(): A mark with the id of "' . $to_mark_id . '" does not exist.');
}
}
}
return $elapsed;
}
/**
* Get statistics on what has happened since calling start();
*
* @return mixed; array of statistics, false on error.
*/
public function getStats()
{
if ($this->start === null) {
$this->logError('Please call ' . __CLASS__ . '::start() before calling ' . __CLASS__ . '::getStats()');
return false;
}
$elapsed = $this->getElapsed();
$stats = [ ];
if (count($this->getMarks())) {
// Average Time (in seconds) Between Marks
$stats[ 'mark_average' ] = $this->getMarkAverage();
// The Shortest Mark
$stats[ 'mark_shortest' ] = $this->getShortestMark();
// The Longest Mark
$stats[ 'mark_longest' ] = $this->getLongestMark();
}
// Start Microtime
$stats[ 'start' ] = $this->start;
// Stop Microtime
$stats[ 'stop' ] = $this->stop ? $this->stop : null;
// Elapsed Time (in seconds) -- Check comments of $this->getElapsed() for more info.
$stats[ 'elapsed' ] = $elapsed;
return $stats;
}
/**
* Dumps Stats, Marks, and Errors then (by default) kills the script.
*
* @param bool ; if true die() -- else output.
*
* @return void;
*/
public function dump($die = true)
{
var_dump([ 'STATISTICS' => $this->getStats(), 'MARKS' => $this->getMarks(), 'ERRORS' => $this->getErrors() ]);
if ($die) {
die();
}
}
/**
* Returns true if any errors occurred.
*
* @return bool;
*/
public function hasErrors()
{
return count($this->errors) ? true : false;
}
/**
* Get the errors array.
*
* @return array;
*/
public function getErrors()
{
return $this->errors;
}
/**
* Get the errors array.
*
* @param string ;
*
* @return void;
*/
protected function logError($error)
{
$this->errors[] = $error;
error_log(__CLASS__ . ': ' . $error);
}
}