bench

<?php

/*
 * This file is part of SoUuid.
 *     (c) Fabrice de Stefanis / https://github.com/fab2s/SoUuid
 * This source file is licensed under the MIT license which you will
 * find in the LICENSE file or at https://opensource.org/licenses/MIT
 */

require __DIR__ . '/vendor/autoload.php';

use fab2s\SoUuid\SoUuid;
use Ramsey\Uuid\Uuid as rUuid;
use SebastianBergmann\Timer\Timer;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Helper\Table;
use Symfony\Component\Console\Output\ConsoleOutput;
use Webpatser\Uuid\Uuid as wUuid;

$output = new ConsoleOutput();
$output->setFormatter(new OutputFormatter(true));

$iterations  = 100000;
$averageOver = 10;
if (!empty($argv[1]) && ($argv[1] === '--help' || $argv[1] === '-h')) {
    $output->writeln('<info>bench usage</info>
<comment>no options</comment>  :   run with default iteration (' . number_format($iterations, 0, '.', ' ') . ') and default average rounds (' . number_format($averageOver, 0, '.', ' ') . ')
<comment>options</comment>     :
    <fg=cyan>-i=</><fg=magenta>[0-9]</>    Number of iterations. Each test will run this many time
    <fg=cyan>-a=</><fg=magenta>[0-9]</>    Compute an average over this many test. Each test will execute
                execute all its iterations this many time.
');
    exit;
}

for ($i = 1; $i <= 2; ++$i) {
    if (!empty($argv[$i])) {
        if (preg_match('`^-i=([0-9]+)$`', $argv[$i], $match)) {
            $iterations = max(1, (int) $match[1]);
        } elseif (preg_match('`^-a=([0-9]+)$`', $argv[$i], $match)) {
            $averageOver = max(1, (int) $match[1]);
        }
    }
}

$comparisons = [
    'fab2s/SoUuid'   => [
        'class'     => SoUuid::class,
        'generate'  => 'generate',
        'getString' => 'getString',
    ],
    'Ramsey/Uuid'    => [
        'class'     => rUuid::class,
        'generate'  => 'uuid1',
        'getString' => '__toString',
    ],
    'Webpatser/Uuid' => [
        'class'     => wUuid::class,
        'generate'  => 'generate',
        'getString' => '__toString',
    ],
];

$report = [];
exec('php -v', $phpVersion);
$output->writeln('<info>Benchmarking ' . implode(' vs ', array_keys($comparisons)) . '</info>');
$output->writeln('<info>Iterations: ' . number_format($iterations, 0, '.', ' ') . '</info>');
$output->writeln('<info>Averaged over: ' . number_format($averageOver, 0, '.', ' ') . '</info>');
$output->writeln('<comment>' . implode(PHP_EOL, $phpVersion) . '</comment>');
$output->writeln('<comment>' . php_uname() . '</comment>');

$averages = [];
foreach ($comparisons as $name => $comparison) {
    $avgTime = 0;
    $call    = $comparison['class'] . '::' . $comparison['generate'];
    for ($i = 0; $i < $averageOver; ++$i) {
        Timer::start();
        for ($cnt = 1; $cnt <= $iterations; ++$cnt) {
            call_user_func($call);
        }

        $avgTime += Timer::stop();
    }

    $averages[$name] = $avgTime / $averageOver;
}

natsort($averages);

$headers          = ['generator' => 'Generator', 'time' => 'Time (s)', 'diff' => 'Delta (s)', 'pct' => '%'];
$rowDefaults      = ['generator' => '', 'time' => '', 'diff' => '', 'pct' => ''];
$table            = new Table($output);
$rows             = $rowDefaults;
$row['generator'] = key($averages);
$winnerTime       = current($averages);
$row['time']      = number_format($winnerTime, 4, '.', ' ');

$table->addRow($row);
unset($averages[$row['generator']]);

foreach ($averages as $name => $time) {
    $diff = $time - $winnerTime;
    $pct  = $diff * 100 / $winnerTime;
    $table->addRow([
        'generator' => $name,
        'time'      => number_format($time, 4, '.', ' '),
        'diff'      => number_format($diff, 4, '.', ' '),
        'pct'       => number_format($pct, 2, '.', ' ') . '%',
    ]);
}

$table->setHeaders($headers)->render();
$output->writeln('');
$output->writeln(Timer::resourceUsage());