Script to benchmark squid purges

diff --git a/maintenance/benchmarkPurge.php b/maintenance/benchmarkPurge.php
new file mode 100644 (file)
index 0000000..bc31b9b
--- /dev/null
+++ b/maintenance/benchmarkPurge.php
@@ -0,0 +1,54 @@
+<?php
+
+/* Squid purge benchmark script */
+
+require_once( "commandLine.inc" );
+
+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 );
+}
+
+function randomUrlList( $length ) {
+       $list = array();
+       for( $i = 0; $i < $length; $i++ ) {
+               $list[] = randomUrl();
+       }
+       return $list;
+}
+
+function randomUrl() {
+       global $wgServer, $wgArticlePath;
+       return $wgServer . str_replace( '$1', randomTitle(), $wgArticlePath );
+}
+
+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 ) {
+       die( "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";
+       $lengths = array( 1, 10, 100 );
+       foreach( $lengths as $length ) {
+               $urls = randomUrlList( $length );
+               $trial = benchSquid( $urls, 4 );
+               print "$trial\n";
+       }
+}
+
+?>