386 lines
9.4 KiB
PHP
386 lines
9.4 KiB
PHP
<?php defined('SYSPATH') or die('No direct script access.');
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/**
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* Provides simple benchmarking and profiling. To display the statistics that
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* have been collected, load the `profiler/stats` [View]:
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*
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* echo View::factory('profiler/stats');
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*
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* @package Kohana
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* @category Helpers
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* @author Kohana Team
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* @copyright (c) 2009-2011 Kohana Team
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* @license http://kohanaframework.org/license
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*/
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class Kohana_Profiler {
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/**
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* @var integer maximium number of application stats to keep
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*/
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public static $rollover = 1000;
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/**
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* @var array collected benchmarks
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*/
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protected static $_marks = array();
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/**
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* Starts a new benchmark and returns a unique token. The returned token
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* _must_ be used when stopping the benchmark.
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*
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* $token = Profiler::start('test', 'profiler');
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*
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* @param string group name
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* @param string benchmark name
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* @return string
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*/
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public static function start($group, $name)
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{
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static $counter = 0;
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// Create a unique token based on the counter
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$token = 'kp/'.base_convert($counter++, 10, 32);
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Profiler::$_marks[$token] = array
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(
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'group' => strtolower($group),
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'name' => (string) $name,
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// Start the benchmark
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'start_time' => microtime(TRUE),
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'start_memory' => memory_get_usage(),
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// Set the stop keys without values
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'stop_time' => FALSE,
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'stop_memory' => FALSE,
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);
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return $token;
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}
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/**
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* Stops a benchmark.
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*
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* Profiler::stop($token);
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*
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* @param string token
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* @return void
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*/
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public static function stop($token)
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{
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// Stop the benchmark
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Profiler::$_marks[$token]['stop_time'] = microtime(TRUE);
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Profiler::$_marks[$token]['stop_memory'] = memory_get_usage();
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}
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/**
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* Deletes a benchmark. If an error occurs during the benchmark, it is
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* recommended to delete the benchmark to prevent statistics from being
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* adversely affected.
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*
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* Profiler::delete($token);
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*
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* @param string token
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* @return void
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*/
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public static function delete($token)
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{
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// Remove the benchmark
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unset(Profiler::$_marks[$token]);
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}
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/**
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* Returns all the benchmark tokens by group and name as an array.
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*
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* $groups = Profiler::groups();
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*
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* @return array
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*/
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public static function groups()
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{
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$groups = array();
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foreach (Profiler::$_marks as $token => $mark)
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{
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// Sort the tokens by the group and name
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$groups[$mark['group']][$mark['name']][] = $token;
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}
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return $groups;
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}
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/**
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* Gets the min, max, average and total of a set of tokens as an array.
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*
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* $stats = Profiler::stats($tokens);
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*
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* @param array profiler tokens
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* @return array min, max, average, total
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* @uses Profiler::total
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*/
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public static function stats(array $tokens)
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{
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// Min and max are unknown by default
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$min = $max = array(
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'time' => NULL,
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'memory' => NULL);
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// Total values are always integers
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$total = array(
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'time' => 0,
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'memory' => 0);
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foreach ($tokens as $token)
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{
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// Get the total time and memory for this benchmark
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list($time, $memory) = Profiler::total($token);
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if ($max['time'] === NULL OR $time > $max['time'])
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{
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// Set the maximum time
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$max['time'] = $time;
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}
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if ($min['time'] === NULL OR $time < $min['time'])
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{
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// Set the minimum time
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$min['time'] = $time;
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}
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// Increase the total time
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$total['time'] += $time;
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if ($max['memory'] === NULL OR $memory > $max['memory'])
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{
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// Set the maximum memory
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$max['memory'] = $memory;
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}
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if ($min['memory'] === NULL OR $memory < $min['memory'])
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{
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// Set the minimum memory
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$min['memory'] = $memory;
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}
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// Increase the total memory
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$total['memory'] += $memory;
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}
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// Determine the number of tokens
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$count = count($tokens);
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// Determine the averages
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$average = array(
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'time' => $total['time'] / $count,
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'memory' => $total['memory'] / $count);
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return array(
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'min' => $min,
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'max' => $max,
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'total' => $total,
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'average' => $average);
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}
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/**
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* Gets the min, max, average and total of profiler groups as an array.
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*
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* $stats = Profiler::group_stats('test');
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*
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* @param mixed single group name string, or array with group names; all groups by default
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* @return array min, max, average, total
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* @uses Profiler::groups
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* @uses Profiler::stats
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*/
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public static function group_stats($groups = NULL)
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{
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// Which groups do we need to calculate stats for?
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$groups = ($groups === NULL)
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? Profiler::groups()
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: array_intersect_key(Profiler::groups(), array_flip( (array) $groups));
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// All statistics
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$stats = array();
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foreach ($groups as $group => $names)
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{
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foreach ($names as $name => $tokens)
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{
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// Store the stats for each subgroup.
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// We only need the values for "total".
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$_stats = Profiler::stats($tokens);
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$stats[$group][$name] = $_stats['total'];
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}
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}
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// Group stats
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$groups = array();
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foreach ($stats as $group => $names)
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{
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// Min and max are unknown by default
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$groups[$group]['min'] = $groups[$group]['max'] = array(
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'time' => NULL,
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'memory' => NULL);
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// Total values are always integers
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$groups[$group]['total'] = array(
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'time' => 0,
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'memory' => 0);
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foreach ($names as $total)
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{
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if ( ! isset($groups[$group]['min']['time']) OR $groups[$group]['min']['time'] > $total['time'])
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{
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// Set the minimum time
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$groups[$group]['min']['time'] = $total['time'];
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}
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if ( ! isset($groups[$group]['min']['memory']) OR $groups[$group]['min']['memory'] > $total['memory'])
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{
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// Set the minimum memory
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$groups[$group]['min']['memory'] = $total['memory'];
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}
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if ( ! isset($groups[$group]['max']['time']) OR $groups[$group]['max']['time'] < $total['time'])
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{
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// Set the maximum time
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$groups[$group]['max']['time'] = $total['time'];
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}
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if ( ! isset($groups[$group]['max']['memory']) OR $groups[$group]['max']['memory'] < $total['memory'])
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{
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// Set the maximum memory
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$groups[$group]['max']['memory'] = $total['memory'];
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}
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// Increase the total time and memory
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$groups[$group]['total']['time'] += $total['time'];
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$groups[$group]['total']['memory'] += $total['memory'];
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}
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// Determine the number of names (subgroups)
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$count = count($names);
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// Determine the averages
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$groups[$group]['average']['time'] = $groups[$group]['total']['time'] / $count;
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$groups[$group]['average']['memory'] = $groups[$group]['total']['memory'] / $count;
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}
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return $groups;
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}
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/**
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* Gets the total execution time and memory usage of a benchmark as a list.
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*
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* list($time, $memory) = Profiler::total($token);
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*
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* @param string token
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* @return array execution time, memory
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*/
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public static function total($token)
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{
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// Import the benchmark data
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$mark = Profiler::$_marks[$token];
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if ($mark['stop_time'] === FALSE)
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{
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// The benchmark has not been stopped yet
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$mark['stop_time'] = microtime(TRUE);
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$mark['stop_memory'] = memory_get_usage();
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}
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return array
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(
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// Total time in seconds
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$mark['stop_time'] - $mark['start_time'],
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// Amount of memory in bytes
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$mark['stop_memory'] - $mark['start_memory'],
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);
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}
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/**
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* Gets the total application run time and memory usage. Caches the result
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* so that it can be compared between requests.
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*
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* list($time, $memory) = Profiler::application();
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*
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* @return array execution time, memory
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* @uses Kohana::cache
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*/
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public static function application()
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{
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// Load the stats from cache, which is valid for 1 day
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$stats = Kohana::cache('profiler_application_stats', NULL, 3600 * 24);
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if ( ! is_array($stats) OR $stats['count'] > Profiler::$rollover)
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{
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// Initialize the stats array
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$stats = array(
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'min' => array(
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'time' => NULL,
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'memory' => NULL),
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'max' => array(
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'time' => NULL,
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'memory' => NULL),
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'total' => array(
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'time' => NULL,
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'memory' => NULL),
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'count' => 0);
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}
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// Get the application run time
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$time = microtime(TRUE) - KOHANA_START_TIME;
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// Get the total memory usage
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$memory = memory_get_usage() - KOHANA_START_MEMORY;
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// Calculate max time
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if ($stats['max']['time'] === NULL OR $time > $stats['max']['time'])
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{
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$stats['max']['time'] = $time;
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}
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// Calculate min time
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if ($stats['min']['time'] === NULL OR $time < $stats['min']['time'])
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{
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$stats['min']['time'] = $time;
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}
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// Add to total time
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$stats['total']['time'] += $time;
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// Calculate max memory
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if ($stats['max']['memory'] === NULL OR $memory > $stats['max']['memory'])
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{
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$stats['max']['memory'] = $memory;
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}
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// Calculate min memory
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if ($stats['min']['memory'] === NULL OR $memory < $stats['min']['memory'])
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{
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$stats['min']['memory'] = $memory;
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}
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// Add to total memory
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$stats['total']['memory'] += $memory;
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// Another mark has been added to the stats
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$stats['count']++;
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// Determine the averages
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$stats['average'] = array(
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'time' => $stats['total']['time'] / $stats['count'],
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'memory' => $stats['total']['memory'] / $stats['count']);
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// Cache the new stats
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Kohana::cache('profiler_application_stats', $stats);
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// Set the current application execution time and memory
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// Do NOT cache these, they are specific to the current request only
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$stats['current']['time'] = $time;
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$stats['current']['memory'] = $memory;
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// Return the total application run time and memory usage
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return $stats;
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}
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} // End Profiler
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