ProfilerSimple.php

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<?php
class ProfilerSimple extends Profiler {
        var $mMinimumTime = 0;

        var $zeroEntry = array('cpu'=> 0.0, 'cpu_sq' => 0.0, 'real' => 0.0, 'real_sq' => 0.0, 'count' => 0);
        var $errorEntry;

        function __construct( $params ) {
                global $wgRequestTime, $wgRUstart;
                parent::__construct( $params );

                $this->errorEntry = $this->zeroEntry;
                $this->errorEntry['count'] = 1;

                if (!empty($wgRequestTime) && !empty($wgRUstart)) {
                        # Remove the -total entry from parent::__construct
                        $this->mWorkStack = array();

                        $this->mWorkStack[] = array( '-total', 0, $wgRequestTime,$this->getCpuTime($wgRUstart));

                        $elapsedcpu = $this->getCpuTime() - $this->getCpuTime($wgRUstart);
                        $elapsedreal = microtime(true) - $wgRequestTime;

                        $entry =& $this->mCollated["-setup"];
                        if (!is_array($entry)) {
                                $entry = $this->zeroEntry;
                                $this->mCollated["-setup"] =& $entry;
                        }
                        $entry['cpu'] += $elapsedcpu;
                        $entry['cpu_sq'] += $elapsedcpu*$elapsedcpu;
                        $entry['real'] += $elapsedreal;
                        $entry['real_sq'] += $elapsedreal*$elapsedreal;
                        $entry['count']++;
                }
        }

        function setMinimum( $min ) {
                $this->mMinimumTime = $min;
        }

        function profileIn($functionname) {
                global $wgDebugFunctionEntry;
                if ($wgDebugFunctionEntry) {
                        $this->debug(str_repeat(' ', count($this->mWorkStack)).'Entering '.$functionname."\n");
                }
                $this->mWorkStack[] = array($functionname, count( $this->mWorkStack ), microtime(true), $this->getCpuTime());
        }

        function profileOut($functionname) {
                global $wgDebugFunctionEntry;

                if ($wgDebugFunctionEntry) {
                        $this->debug(str_repeat(' ', count($this->mWorkStack) - 1).'Exiting '.$functionname."\n");
                }

                list($ofname, /* $ocount */ ,$ortime,$octime) = array_pop($this->mWorkStack);

                if (!$ofname) {
                        $this->debug("Profiling error: $functionname\n");
                } else {
                        if ($functionname == 'close') {
                                $message = "Profile section ended by close(): {$ofname}";
                                $functionname = $ofname;
                                $this->debug( "$message\n" );
                                $this->mCollated[$message] = $this->errorEntry;
                        }
                        elseif ($ofname != $functionname) {
                                $message = "Profiling error: in({$ofname}), out($functionname)";
                                $this->debug( "$message\n" );
                                $this->mCollated[$message] = $this->errorEntry;
                        }
                        $entry =& $this->mCollated[$functionname];
                        $elapsedcpu = $this->getCpuTime() - $octime;
                        $elapsedreal = microtime(true) - $ortime;
                        if (!is_array($entry)) {
                                $entry = $this->zeroEntry;
                                $this->mCollated[$functionname] =& $entry;
                        }
                        $entry['cpu'] += $elapsedcpu;
                        $entry['cpu_sq'] += $elapsedcpu*$elapsedcpu;
                        $entry['real'] += $elapsedreal;
                        $entry['real_sq'] += $elapsedreal*$elapsedreal;
                        $entry['count']++;

                }
        }

        public function getFunctionReport() {
                /* Implement in output subclasses */
                return '';
        }

        public function logData() {
                /* Implement in subclasses */
        }

        function getCpuTime($ru=null) {
                if ( function_exists( 'getrusage' ) ) {
                        if ( $ru == null ) {
                                $ru = getrusage();
                        }
                        return ($ru['ru_utime.tv_sec'] + $ru['ru_stime.tv_sec'] + ($ru['ru_utime.tv_usec'] +
                                $ru['ru_stime.tv_usec']) * 1e-6);
                } else {
                        return 0;
                }
        }
}