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<?php
namespace Drupal\Component\Utility;
/**
* Provides helpers to use timers throughout a request.
*
* @ingroup utility
*/
class Timer {
static protected $timers = [];
/**
* Starts the timer with the specified name.
*
* If you start and stop the same timer multiple times, the measured intervals
* will be accumulated.
*
* @param $name
* The name of the timer.
*/
static public function start($name) {
static::$timers[$name]['start'] = microtime(TRUE);
static::$timers[$name]['count'] = isset(static::$timers[$name]['count']) ? ++static::$timers[$name]['count'] : 1;
}
/**
* Reads the current timer value without stopping the timer.
*
* @param string $name
* The name of the timer.
*
* @return int
* The current timer value in ms.
*/
static public function read($name) {
if (isset(static::$timers[$name]['start'])) {
$stop = microtime(TRUE);
$diff = round(($stop - static::$timers[$name]['start']) * 1000, 2);
if (isset(static::$timers[$name]['time'])) {
$diff += static::$timers[$name]['time'];
}
return $diff;
}
return static::$timers[$name]['time'];
}
/**
* Stops the timer with the specified name.
*
* @param string $name
* The name of the timer.
*
* @return array
* A timer array. The array contains the number of times the timer has been
* started and stopped (count) and the accumulated timer value in ms (time).
*/
static public function stop($name) {
if (isset(static::$timers[$name]['start'])) {
$stop = microtime(TRUE);
$diff = round(($stop - static::$timers[$name]['start']) * 1000, 2);
if (isset(static::$timers[$name]['time'])) {
static::$timers[$name]['time'] += $diff;
}
else {
static::$timers[$name]['time'] = $diff;
}
unset(static::$timers[$name]['start']);
}
return static::$timers[$name];
}
}