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<?php
// define('BENCHMARKED', true); // then you know if class is active
class Benchmark {
private static $timeSpots = Array();
private static $memoryUse = Array();
private static $enableReport = true;
/** add_timespot
* ---
* add new timespot
* @param $key : label of timespot
*/
public static function add_spot(string $key)
{
self::$timeSpots[$key] = microtime(true);
self::$memoryUse[$key] = round(memory_get_usage()/(1024*1024),2);
}
/** exist
* checks if a benchmark spot with label $key exists
*/
public static function exist(string $key) : bool
{
return isset(self::$timeSpots[$key]);
}
/** desableReport
* (Self-explanatory)
*/
public static function disableReport()
{
self::$enableReport = false;
}
/** render_benchmark_report
* ---
* renders performance report
* as html comment at the end of webpage in various modes
* @param $mode (string)
* + 'comment' (default): include report as html comment
* + 'html' : include report as a html div
* + 'code' : include report as a pre/code block
*/
public static function render_report(string $mode = 'comment' )
{
if (self::$enableReport) {
switch ($mode) {
case 'html':
$open = '<p>';
$close = '</b></p>';
$divider = ":<b>";
$prefix = '<div>';
$suffix = '</div>';
break;
case 'code':
$open = '';
$close = '';
$divider = ": ";
$prefix = '<pre>';
$suffix = '</pre>';
break;
case 'comment':
default:
$open = '<!--';
$close = '-->';
$divider = ":";
$prefix = '';
$suffix = '';
break;
}
echo $prefix;
// TIME REPORT
// ---------------------------------------------------------------------
echo "\n\n{$open} Timings {$close}";
// valid from php 7.3
// $start = self::$timeSpots[ array_key_first(self::$timespots) ];
// $end = self::$timeSpots[ array_key_last(self::$timespots) ];
$start = self::$timeSpots['start'];
$end = self::$timeSpots['end'];
$all_dt = number_format($end - $start , 4)*1000 ." ms";
// if more than 2 timespots
// echo dt between each spot
if (count(self::$timeSpots) > 2) {
// calculate dt between spots
$time_results = array();
$prev_key = '';
$prev_time = 0;
foreach(self::$timeSpots as $key => $t) {
if (!$prev_time) {
$prev_time = $t;
$prev_key = $key;
}
else {
$dt = number_format($t - $prev_time , 4)*1000 ." ms";
$time_results[] = array(
'part' => "{$prev_key}[..{$key}]", ///$key,
'dt' => $dt
);
$prev_key = $key; //// "{$prev_key}[..{$key}]";
$prev_time = $t;
}
}
// echo timings
foreach ($time_results as $key => $val) {
echo "\n\t{$open} {$val['part']} {$divider} {$val['dt']} {$close}";
}
}
// echo total time
echo "\n\t{$open} total {$divider} {$all_dt} {$close}";
// MEMORY REPORT
// ---------------------------------------------------------------------
echo "\n\n{$open} Memory Usage {$close}";
if (count(self::$memoryUse) > 2) {
foreach (self::$memoryUse as $key => $val) {
echo "\n\t{$open} {$key} {$divider} {$val}MB {$close}";
}
} else {
echo "\n\t{$open} memory usage {$divider} ". round(memory_get_usage()/(1024*1024),2) ."MB {$close}";
}
echo $suffix;
}
}
}
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