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<?php |
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namespace Elgg; |
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use Elgg\Project\Paths; |
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/** |
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* Analyzes duration of functions, queries, and processes |
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* |
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* @access private |
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*/ |
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class Profiler { |
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public $percentage_format = "%01.2f"; |
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public $duration_format = "%01.6f"; |
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public $minimum_percentage = 0.2; |
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/** |
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* @var float Total time |
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*/ |
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private $total; |
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/** |
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* Return a tree of time periods from a Timer |
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* |
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* @param Timer $timer Timer object |
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* @return array |
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*/ |
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public function buildTree(Timer $timer) { |
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$times = $timer->getTimes(); |
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if (!isset($times[':end'])) { |
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$times[':end'] = microtime(); |
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} |
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$begin = $this->findBeginTime($times); |
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$end = $this->findEndTime($times); |
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$this->total = $this->diffMicrotime($begin, $end); |
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return $this->analyzePeriod('', $times); |
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} |
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/** |
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* Turn the tree of times into a sorted list |
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* |
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* @param array $list Output list of times to populate |
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* @param array $tree Result of buildTree() |
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* @param string $prefix Prefix of period string. Leave empty. |
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* @return void |
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*/ |
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public function flattenTree(array &$list = [], array $tree = [], $prefix = '') { |
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$is_root = empty($list); |
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if (isset($tree['periods'])) { |
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foreach ($tree['periods'] as $period) { |
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$this->flattenTree($list, $period, "{$prefix} {$period['name']}"); |
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} |
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unset($tree['periods']); |
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} |
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$tree['name'] = trim($prefix); |
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$list[] = $tree; |
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if ($is_root) { |
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usort($list, function ($a, $b) { |
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if ($a['duration'] == $b['duration']) { |
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return 0; |
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} |
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return ($a['duration'] > $b['duration']) ? -1 : 1; |
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}); |
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} |
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} |
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/** |
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* Nicely format the elapsed time values |
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* |
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* @param array $tree Result of buildTree() |
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* @return array |
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*/ |
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public function formatTree(array $tree) { |
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$tree['duration'] = sprintf($this->duration_format, $tree['duration']); |
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if (isset($tree['percentage'])) { |
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$tree['percentage'] = sprintf($this->percentage_format, $tree['percentage']); |
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} |
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if (isset($tree['periods'])) { |
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$tree['periods'] = array_map([$this, 'formatTree'], $tree['periods']); |
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} |
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return $tree; |
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} |
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/** |
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* Append a SCRIPT element to the page output |
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* |
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* @param string $hook "output" |
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* @param string $type "page" |
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* @param string $html Full page HTML |
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* @param array $params Hook params |
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* |
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* @return string |
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*/ |
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public static function handlePageOutput($hook, $type, $html, $params) { |
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$profiler = new self(); |
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$min_percentage = _elgg_config()->profiling_minimum_percentage; |
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if ($min_percentage !== null) { |
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$profiler->minimum_percentage = $min_percentage; |
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} |
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$tree = $profiler->buildTree(_elgg_services()->timer); |
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$tree = $profiler->formatTree($tree); |
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$data['tree'] = $tree; |
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$data['total'] = $tree['duration'] . " seconds"; |
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$list = []; |
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$profiler->flattenTree($list, $tree); |
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$root = Paths::project(); |
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$list = array_map(function ($period) use ($root) { |
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$period['name'] = str_replace("Closure $root", "Closure ", $period['name']); |
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return "{$period['percentage']}% ({$period['duration']}) {$period['name']}"; |
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}, $list); |
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$data['list'] = $list; |
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$html .= "<script>console.log(" . json_encode($data) . ");</script>"; |
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return $html; |
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} |
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/** |
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* Analyze a time period |
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* |
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* @param string $name Period name |
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* @param array $times Times |
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* |
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* @return array|bool False if missing begin/end time |
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*/ |
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private function analyzePeriod($name, array $times) { |
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$begin = $this->findBeginTime($times); |
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$end = $this->findEndTime($times); |
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if ($begin === false || $end === false) { |
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return false; |
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} |
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unset($times[':begin'], $times[':end']); |
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$total = $this->diffMicrotime($begin, $end); |
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$ret = [ |
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'name' => $name, |
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'percentage' => 100, // may be overwritten by parent |
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'duration' => $total, |
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]; |
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foreach ($times as $times_key => $period) { |
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$period = $this->analyzePeriod($times_key, $period); |
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if ($period === false) { |
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continue; |
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} |
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$period['percentage'] = 100 * $period['duration'] / $this->total; |
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if ($period['percentage'] < $this->minimum_percentage) { |
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continue; |
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} |
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$ret['periods'][] = $period; |
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} |
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if (isset($ret['periods'])) { |
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usort($ret['periods'], function ($a, $b) { |
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if ($a['duration'] == $b['duration']) { |
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return 0; |
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} |
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return ($a['duration'] > $b['duration']) ? -1 : 1; |
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}); |
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} |
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return $ret; |
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} |
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/** |
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* Get the microtime start time |
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* |
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* @param array $times Time periods |
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* @return string|false |
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*/ |
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private function findBeginTime(array $times) { |
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if (isset($times[':begin'])) { |
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return $times[':begin']; |
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} |
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unset($times[':begin'], $times[':end']); |
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$first = reset($times); |
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if (is_array($first)) { |
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return $this->findBeginTime($first); |
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} |
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return false; |
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} |
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/** |
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* Get the microtime end time |
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* |
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* @param array $times Time periods |
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* @return string|false |
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*/ |
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private function findEndTime(array $times) { |
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if (isset($times[':end'])) { |
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return $times[':end']; |
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} |
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unset($times[':begin'], $times[':end']); |
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$last = end($times); |
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if (is_array($last)) { |
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return $this->findEndTime($last); |
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} |
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return false; |
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} |
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/** |
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* Calculate a precise time difference. |
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* |
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* @param string $start result of microtime() |
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* @param string $end result of microtime() |
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* |
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* @return float difference in seconds, calculated with minimum precision loss |
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*/ |
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private function diffMicrotime($start, $end) { |
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list($start_usec, $start_sec) = explode(" ", $start); |
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list($end_usec, $end_sec) = explode(" ", $end); |
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$diff_sec = (int) $end_sec - (int) $start_sec; |
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$diff_usec = (float) $end_usec - (float) $start_usec; |
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return (float) $diff_sec + $diff_usec; |
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} |
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} |
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Elgg /
Elgg
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