maintenance/benchmarkPurge.php

   1 <?php
   2 /**
   3  * Squid purge benchmark script
   4  *
   5  * @file
   6  * @ingroup Maintenance
   7  */
   8
   9 /** */
  10 require_once( "commandLine.inc" );
  11
  12 /** @todo document */
  13 function benchSquid( $urls, $trials = 1 ) {
  14         $start = wfTime();
  15         for( $i = 0; $i < $trials; $i++) {
  16                 SquidUpdate::purge( $urls );
  17         }
  18         $delta = wfTime() - $start;
  19         $pertrial = $delta / $trials;
  20         $pertitle = $pertrial / count( $urls );
  21         return sprintf( "%4d titles in %6.2fms (%6.2fms each)",
  22                 count( $urls ), $pertrial * 1000.0, $pertitle * 1000.0 );
  23 }
  24
  25 /** @todo document */
  26 function randomUrlList( $length ) {
  27         $list = array();
  28         for( $i = 0; $i < $length; $i++ ) {
  29                 $list[] = randomUrl();
  30         }
  31         return $list;
  32 }
  33
  34 /** @todo document */
  35 function randomUrl() {
  36         global $wgServer, $wgArticlePath;
  37         return $wgServer . str_replace( '$1', randomTitle(), $wgArticlePath );
  38 }
  39
  40 /** @todo document */
  41 function randomTitle() {
  42         $str = '';
  43         $length = mt_rand( 1, 20 );
  44         for( $i = 0; $i < $length; $i++ ) {
  45                 $str .= chr( mt_rand( ord('a'), ord('z') ) );
  46         }
  47         return ucfirst( $str );
  48 }
  49
  50 if( !$wgUseSquid ) {
  51         wfDie( "Squid purge benchmark doesn't do much without squid support on.\n" );
  52 } else {
  53         printf( "There are %d defined squid servers:\n", count( $wgSquidServers ) );
  54         #echo implode( "\n", $wgSquidServers ) . "\n";
  55         if( isset( $options['count'] ) ) {
  56                 $lengths = array( intval( $options['count'] ) );
  57         } else {
  58                 $lengths = array( 1, 10, 100 );
  59         }
  60         foreach( $lengths as $length ) {
  61                 $urls = randomUrlList( $length );
  62                 $trial = benchSquid( $urls );
  63                 print "$trial\n";
  64         }
  65 }