Executioner.snippet.php

<?php
$output = '';
$tElementClass = !empty($tElementClass) ? $tElementClass : 'modSnippet';

$tStart = $modx->getMicroTime();
if (!empty($tElement)) {
    switch ($tElementClass) {
        case 'modChunk':
            $output = $modx->getChunk($tElement, $scriptProperties);
            break;
        case 'modSnippet':
            $output = $modx->runSnippet($tElement, $scriptProperties);
            break;
        default:
            $tElementObj = $modx->getObject($tElementClass, array('name' => $tElement));
            if ($tElementObj && $tElementObj instanceof modElement) {
                $tElementObj->setCacheable(false);
                $output = $tElementObj->process($scriptProperties);
            } else {
                $modx->log(modX::LOG_LEVEL_ERROR, "{$tElementClass}: {$tElement} is not a valid MODx Element");
            }
            break;
    }
}
$tEnd = $modx->getMicroTime();

$modx->log(modX::LOG_LEVEL_ERROR, "{$tElementClass}: {$tElement} executed in " . sprintf("%2.4f s", $tEnd - $tStart));

return $output;
?>

An quick MODx Snippet you can use to wrap other Snippets, Chunks, or Template Variables and get log messages indicating how long it took to execute each element. For instance, a getResources call that looks like:

[[!getResources? &parents=`4` &where=`{"template:IN":[1,2,3]}` &sortbyTV=`eventDate` &sortdirTV=`ASC` &sortby=`` &tpl=`getResourcesTpl`]]

would become:

[[!Executioner? &tElement=`getResources` &parents=`4` &where=`{"template:IN":[1,2,3]}` &sortbyTV=`eventDate` &sortdirTV=`ASC` &sortby=`` &tpl=`getResourcesTpl`]]

Then in your error.log you will see messages like:

[2010-10-01 13:06:21] (ERROR @ /revo-master/index.php) modSnippet: getResources executed in 0.0524 s

Jason, how can I use propertyset enabled call with executioner? eg. [[getResources@inTheNews? &parents=[[*id]]]]

You simply do:
[[!Executioner@inTheNews? &parents=[[*id]]]]

You will have to attach the Executioner snippet to the Property Set though.

is this snippet still in development? If so, wouldn't be possible to add an option for automatically wrapping all snippets or chunks and displaying execution time for each element at the end of its code on the page?