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<?php
/**
* Squid purge benchmark script
*
* @file
* @ingroup Maintenance
*/
/** */
require_once( "commandLine.inc" );
/**
* Run a bunch of URLs through SquidUpdate::purge()
* to benchmark Squid response times.
* @param $urls array A bunch of URLs to purge
* @param $trials int How many times to run the test?
*/
function benchSquid( $urls, $trials = 1 ) {
$start = wfTime();
for( $i = 0; $i < $trials; $i++) {
SquidUpdate::purge( $urls );
}
$delta = wfTime() - $start;
$pertrial = $delta / $trials;
$pertitle = $pertrial / count( $urls );
return sprintf( "%4d titles in %6.2fms (%6.2fms each)",
count( $urls ), $pertrial * 1000.0, $pertitle * 1000.0 );
}
/**
* Get an array of randomUrl()'s.
* @param $length int How many urls to add to the array
*/
function randomUrlList( $length ) {
$list = array();
for( $i = 0; $i < $length; $i++ ) {
$list[] = randomUrl();
}
return $list;
}
/**
* Return a random URL of the wiki. Not necessarily an actual title in the
* database, but at least a URL that looks like one.
*/
function randomUrl() {
global $wgServer, $wgArticlePath;
return $wgServer . str_replace( '$1', randomTitle(), $wgArticlePath );
}
/**
* Create a random title string (not necessarily a Title object).
* For use with randomUrl().
*/
function randomTitle() {
$str = '';
$length = mt_rand( 1, 20 );
for( $i = 0; $i < $length; $i++ ) {
$str .= chr( mt_rand( ord('a'), ord('z') ) );
}
return ucfirst( $str );
}
if( !$wgUseSquid ) {
wfDie( "Squid purge benchmark doesn't do much without squid support on.\n" );
} else {
printf( "There are %d defined squid servers:\n", count( $wgSquidServers ) );
#echo implode( "\n", $wgSquidServers ) . "\n";
if( isset( $options['count'] ) ) {
$lengths = array( intval( $options['count'] ) );
} else {
$lengths = array( 1, 10, 100 );
}
foreach( $lengths as $length ) {
$urls = randomUrlList( $length );
$trial = benchSquid( $urls );
print "$trial\n";
}
}
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