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<?php
/**
* @defgroup Benchmark Benchmark
* @ingroup Maintenance
*/
/**
* Base code for benchmark scripts.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Benchmark
*/
use Wikimedia\RunningStat;
// @codeCoverageIgnoreStart
require_once __DIR__ . '/../Maintenance.php';
// @codeCoverageIgnoreEnd
/**
* Base class for benchmark scripts.
*
* @ingroup Benchmark
*/
abstract class Benchmarker extends Maintenance {
protected $defaultCount = 100;
private $lang;
public function __construct() {
parent::__construct();
$this->addOption( 'count', 'How many times to run a benchmark', false, true );
$this->addOption( 'verbose', 'Verbose logging of resource usage', false, false, 'v' );
}
public function bench( array $benchs ) {
$this->lang = Language::factory( 'en' );
$this->startBench();
$count = $this->getOption( 'count', $this->defaultCount );
$verbose = $this->hasOption( 'verbose' );
foreach ( $benchs as $key => $bench ) {
// Shortcut for simple functions
if ( is_callable( $bench ) ) {
$bench = [ 'function' => $bench ];
}
// Default to no arguments
if ( !isset( $bench['args'] ) ) {
$bench['args'] = [];
}
// Optional setup called outside time measure
if ( isset( $bench['setup'] ) ) {
call_user_func( $bench['setup'] );
}
// Run benchmarks
$stat = new RunningStat();
for ( $i = 0; $i < $count; $i++ ) {
$t = microtime( true );
call_user_func_array( $bench['function'], $bench['args'] );
$t = ( microtime( true ) - $t ) * 1000;
if ( $verbose ) {
$this->verboseRun( $i );
}
$stat->addObservation( $t );
}
// Name defaults to name of called function
if ( is_string( $key ) ) {
$name = $key;
} else {
if ( is_array( $bench['function'] ) ) {
$name = get_class( $bench['function'][0] ) . '::' . $bench['function'][1];
} else {
$name = strval( $bench['function'] );
}
$name = sprintf( "%s(%s)",
$name,
implode( ', ', $bench['args'] )
);
}
$this->addResult( [
'name' => $name,
'count' => $stat->getCount(),
// Get rate per second from mean (in ms)
'rate' => $stat->getMean() == 0 ? INF : ( 1.0 / ( $stat->getMean() / 1000.0 ) ),
'total' => $stat->getMean() * $stat->getCount(),
'mean' => $stat->getMean(),
'max' => $stat->max,
'stddev' => $stat->getStdDev(),
'usage' => [
'mem' => memory_get_usage( true ),
'mempeak' => memory_get_peak_usage( true ),
],
] );
}
}
public function startBench() {
$this->output(
sprintf( "Running PHP version %s (%s) on %s %s %s\n\n",
phpversion(),
php_uname( 'm' ),
php_uname( 's' ),
php_uname( 'r' ),
php_uname( 'v' )
)
);
}
public function addResult( $res ) {
$ret = sprintf( "%s\n %' 6s: %d\n",
$res['name'],
'count',
$res['count']
);
$ret .= sprintf( " %' 6s: %8.1f/s\n",
'rate',
$res['rate']
);
foreach ( [ 'total', 'mean', 'max', 'stddev' ] as $metric ) {
$ret .= sprintf( " %' 6s: %8.2fms\n",
$metric,
$res[$metric]
);
}
foreach ( [
'mem' => 'Current memory usage',
'mempeak' => 'Peak memory usage'
] as $key => $label ) {
$ret .= sprintf( "%' 20s: %s\n",
$label,
$this->lang->formatSize( $res['usage'][$key] )
);
}
$this->output( "$ret\n" );
}
protected function verboseRun( $iteration ) {
$this->output( sprintf( "#%3d - memory: %-10s - peak: %-10s\n",
$iteration,
$this->lang->formatSize( memory_get_usage( true ) ),
$this->lang->formatSize( memory_get_peak_usage( true ) )
) );
}
}
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