Stopwatch.php in Devel 8

Namespace

Drupal\webprofiler

File

webprofiler/src/Stopwatch.php

<?php

namespace Drupal\webprofiler;


/**
 * Class Stopwatch
 */
class Stopwatch extends \Symfony\Component\Stopwatch\Stopwatch {

}
namespace Symfony\Component\Stopwatch;


/**
 * Class Stopwatch
 */
class Stopwatch {

  /**
   * @var Section[]
   */
  private $sections;

  /**
   * @var array
   */
  private $activeSections;

  /**
   *
   */
  public function __construct() {
    $this->sections = $this->activeSections = [
      '__root__' => new Section('__root__'),
    ];
  }

  /**
   * Creates a new section or re-opens an existing section.
   *
   * @param string|null $id The id of the session to re-open, null to create a new one
   *
   * @throws \LogicException When the section to re-open is not reachable
   */
  public function openSection($id = NULL) {
    $current = end($this->activeSections);
    if (NULL !== $id && NULL === $current
      ->get($id)) {
      throw new \LogicException(sprintf('The section "%s" has been started at an other level and can not be opened.', $id));
    }
    $this
      ->start('__section__.child', 'section');
    $this->activeSections[] = $current
      ->open($id);
    $this
      ->start('__section__');
  }

  /**
   * Stops the last started section.
   *
   * The id parameter is used to retrieve the events from this section.
   *
   * @see getSectionEvents
   *
   * @param string $id The identifier of the section
   *
   * @throws \LogicException When there's no started section to be stopped
   */
  public function stopSection($id) {
    $this
      ->stop('__section__');
    if (1 == count($this->activeSections)) {
      throw new \LogicException('There is no started section to stop.');
    }
    $this->sections[$id] = array_pop($this->activeSections)
      ->setId($id);
    $this
      ->stop('__section__.child');
  }

  /**
   * Starts an event.
   *
   * @param string $name The event name
   * @param string $category The event category
   *
   * @return StopwatchEvent A StopwatchEvent instance
   */
  public function start($name, $category = NULL) {
    return end($this->activeSections)
      ->startEvent($name, $category);
  }

  /**
   * Checks if the event was started
   *
   * @param string $name The event name
   *
   * @return bool
   */
  public function isStarted($name) {
    return end($this->activeSections)
      ->isEventStarted($name);
  }

  /**
   * Stops an event.
   *
   * @param string $name The event name
   *
   * @return StopwatchEvent A StopwatchEvent instance
   */
  public function stop($name) {
    return end($this->activeSections)
      ->stopEvent($name);
  }

  /**
   * Stops then restarts an event.
   *
   * @param string $name The event name
   *
   * @return StopwatchEvent A StopwatchEvent instance
   */
  public function lap($name) {
    return end($this->activeSections)
      ->stopEvent($name)
      ->start();
  }

  /**
   * Gets all events for a given section.
   *
   * @param string $id A section identifier
   *
   * @return StopwatchEvent[] An array of StopwatchEvent instances
   */
  public function getSectionEvents($id) {
    return isset($this->sections[$id]) ? $this->sections[$id]
      ->getEvents() : [];
  }

}

/**
 * @internal This class is for internal usage only
 *
 * @author Fabien Potencier <[e-mail]>
 */
class Section {

  /**
   * @var StopwatchEvent[]
   */
  private $events = [];

  /**
   * @var null|float
   */
  private $origin;

  /**
   * @var string
   */
  private $id;

  /**
   * @var Section[]
   */
  private $children = [];

  /**
   * Constructor.
   *
   * @param float|null $origin Set the origin of the events in this section, use null to set their origin to their start time
   */
  public function __construct($origin = NULL) {
    $this->origin = is_numeric($origin) ? $origin : NULL;
  }

  /**
   * Returns the child section.
   *
   * @param string $id The child section identifier
   *
   * @return Section|null The child section or null when none found
   */
  public function get($id) {
    foreach ($this->children as $child) {
      if ($id === $child
        ->getId()) {
        return $child;
      }
    }
    return NULL;
  }

  /**
   * Creates or re-opens a child section.
   *
   * @param string|null $id null to create a new section, the identifier to re-open an existing one.
   *
   * @return Section A child section
   */
  public function open($id) {
    if (NULL === ($session = $this
      ->get($id))) {
      $session = $this->children[] = new self(microtime(TRUE) * 1000);
    }
    return $session;
  }

  /**
   * @return string The identifier of the section
   */
  public function getId() {
    return $this->id;
  }

  /**
   * Sets the session identifier.
   *
   * @param string $id The session identifier
   *
   * @return Section The current section
   */
  public function setId($id) {
    $this->id = $id;
    return $this;
  }

  /**
   * Starts an event.
   *
   * @param string $name The event name
   * @param string $category The event category
   *
   * @return StopwatchEvent The event
   */
  public function startEvent($name, $category) {
    if (!isset($this->events[$name])) {
      $this->events[$name] = new StopwatchEvent($this->origin ?: microtime(TRUE) * 1000, $category);
    }
    return $this->events[$name]
      ->start();
  }

  /**
   * Checks if the event was started
   *
   * @param string $name The event name
   *
   * @return bool
   */
  public function isEventStarted($name) {
    return isset($this->events[$name]) && $this->events[$name]
      ->isStarted();
  }

  /**
   * Stops an event.
   *
   * @param string $name The event name
   *
   * @return StopwatchEvent The event
   *
   * @throws \LogicException When the event has not been started
   */
  public function stopEvent($name) {
    if (!isset($this->events[$name])) {
      throw new \LogicException(sprintf('Event "%s" is not started.', $name));
    }
    return $this->events[$name]
      ->stop();
  }

  /**
   * Stops then restarts an event.
   *
   * @param string $name The event name
   *
   * @return StopwatchEvent The event
   *
   * @throws \LogicException When the event has not been started
   */
  public function lap($name) {
    return $this
      ->stopEvent($name)
      ->start();
  }

  /**
   * Returns the events from this section.
   *
   * @return StopwatchEvent[] An array of StopwatchEvent instances
   */
  public function getEvents() {
    return $this->events;
  }

}

/**
 * Class StopwatchEvent
 */
class StopwatchEvent {

  /**
   * @var StopwatchPeriod[]
   */
  private $periods = [];

  /**
   * @var float
   */
  private $origin;

  /**
   * @var string
   */
  private $category;

  /**
   * @var float[]
   */
  private $started = [];

  /**
   * Constructor.
   *
   * @param float $origin The origin time in milliseconds
   * @param string|null $category The event category or null to use the default
   *
   * @throws \InvalidArgumentException When the raw time is not valid
   */
  public function __construct($origin, $category = NULL) {
    $this->origin = $this
      ->formatTime($origin);
    $this->category = is_string($category) ? $category : 'default';
  }

  /**
   * Gets the category.
   *
   * @return string The category
   */
  public function getCategory() {
    return $this->category;
  }

  /**
   * Gets the origin.
   *
   * @return float The origin in milliseconds
   */
  public function getOrigin() {
    return $this->origin;
  }

  /**
   * Starts a new event period.
   *
   * @return StopwatchEvent The event
   */
  public function start() {
    $this->started[] = $this
      ->getNow();
    return $this;
  }

  /**
   * Stops the last started event period.
   *
   * @throws \LogicException When start wasn't called before stopping
   *
   * @return StopwatchEvent The event
   *
   * @throws \LogicException When stop() is called without a matching call to start()
   */
  public function stop() {
    if (!count($this->started)) {
      throw new \LogicException('stop() called but start() has not been called before.');
    }
    $this->periods[] = new StopwatchPeriod(array_pop($this->started), $this
      ->getNow());
    return $this;
  }

  /**
   * Checks if the event was started
   *
   * @return bool
   */
  public function isStarted() {
    return !empty($this->started);
  }

  /**
   * Stops the current period and then starts a new one.
   *
   * @return StopwatchEvent The event
   */
  public function lap() {
    return $this
      ->stop()
      ->start();
  }

  /**
   * Stops all non already stopped periods.
   */
  public function ensureStopped() {
    while (count($this->started)) {
      $this
        ->stop();
    }
  }

  /**
   * Gets all event periods.
   *
   * @return StopwatchPeriod[] An array of StopwatchPeriod instances
   */
  public function getPeriods() {
    return $this->periods;
  }

  /**
   * Gets the relative time of the start of the first period.
   *
   * @return integer The time (in milliseconds)
   */
  public function getStartTime() {
    return isset($this->periods[0]) ? $this->periods[0]
      ->getStartTime() : 0;
  }

  /**
   * Gets the relative time of the end of the last period.
   *
   * @return integer The time (in milliseconds)
   */
  public function getEndTime() {
    return ($count = count($this->periods)) ? $this->periods[$count - 1]
      ->getEndTime() : 0;
  }

  /**
   * Gets the duration of the events (including all periods).
   *
   * @return integer The duration (in milliseconds)
   */
  public function getDuration() {
    $total = 0;
    foreach ($this->periods as $period) {
      $total += $period
        ->getDuration();
    }
    return $total;
  }

  /**
   * Gets the max memory usage of all periods.
   *
   * @return integer The memory usage (in bytes)
   */
  public function getMemory() {
    $memory = 0;
    foreach ($this->periods as $period) {
      if ($period
        ->getMemory() > $memory) {
        $memory = $period
          ->getMemory();
      }
    }
    return $memory;
  }

  /**
   * Return the current time relative to origin.
   *
   * @return float Time in ms
   */
  protected function getNow() {
    return $this
      ->formatTime(microtime(TRUE) * 1000 - $this->origin);
  }

  /**
   * Formats a time.
   *
   * @param integer|float $time A raw time
   *
   * @return float The formatted time
   *
   * @throws \InvalidArgumentException When the raw time is not valid
   */
  private function formatTime($time) {
    if (!is_numeric($time)) {
      throw new \InvalidArgumentException('The time must be a numerical value');
    }
    return round($time, 1);
  }

}

/**
 * Class StopwatchPeriod
 */
class StopwatchPeriod {
  private $start;
  private $end;
  private $memory;

  /**
   * Constructor.
   *
   * @param integer $start The relative time of the start of the period (in milliseconds)
   * @param integer $end The relative time of the end of the period (in milliseconds)
   */
  public function __construct($start, $end) {
    $this->start = (int) $start;
    $this->end = (int) $end;
    $this->memory = memory_get_usage(TRUE);
  }

  /**
   * Gets the relative time of the start of the period.
   *
   * @return integer The time (in milliseconds)
   */
  public function getStartTime() {
    return $this->start;
  }

  /**
   * Gets the relative time of the end of the period.
   *
   * @return integer The time (in milliseconds)
   */
  public function getEndTime() {
    return $this->end;
  }

  /**
   * Gets the time spent in this period.
   *
   * @return integer The period duration (in milliseconds)
   */
  public function getDuration() {
    return $this->end - $this->start;
  }

  /**
   * Gets the memory usage.
   *
   * @return integer The memory usage (in bytes)
   */
  public function getMemory() {
    return $this->memory;
  }

}

Classes

Name	Description
Section	@internal This class is for internal usage only
Stopwatch	Class Stopwatch
StopwatchEvent	Class StopwatchEvent
StopwatchPeriod	Class StopwatchPeriod