48 lines
1.6 KiB
PHP
48 lines
1.6 KiB
PHP
<?php
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// $ php examples/11-benchmark.php
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// $ php examples/11-benchmark.php echo test
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// $ php examples/11-benchmark.php dd if=/dev/zero bs=1M count=1000
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use React\EventLoop\Factory;
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use React\ChildProcess\Process;
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require __DIR__ . '/../vendor/autoload.php';
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$cmd = isset($argv[1]) ? implode(' ', array_slice($argv, 1)) : 'dd if=/dev/zero bs=1M count=1000';
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$loop = Factory::create();
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$info = new React\Stream\WritableResourceStream(STDERR, $loop);
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$info->write('Counts number of chunks/bytes received from process STDOUT' . PHP_EOL);
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$info->write('Command: ' . $cmd . PHP_EOL);
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if (extension_loaded('xdebug')) {
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$info->write('NOTICE: The "xdebug" extension is loaded, this has a major impact on performance.' . PHP_EOL);
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}
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$process = new Process($cmd);
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$process->start($loop);
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$start = microtime(true);
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$chunks = 0;
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$bytes = 0;
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$process->stdout->on('data', function ($chunk) use (&$chunks, &$bytes) {
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++$chunks;
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$bytes += strlen($chunk);
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});
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// print stream position once stream closes
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$process->on('exit', function () use (&$chunks, &$bytes, $start, $info) {
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$t = microtime(true) - $start;
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$info->write('read ' . $chunks . ' chunks with ' . $bytes . ' byte(s) in ' . round($t, 3) . ' second(s) => ' . round($bytes / 1024 / 1024 / $t, 1) . ' MiB/s' . PHP_EOL);
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$info->write('peak memory usage of ' . round(memory_get_peak_usage(true) / 1024 / 1024, 1) . ' MiB' . PHP_EOL);
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});
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// report any other output/errors
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$process->stdout->on('error', array($info, 'write'));
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$process->stderr->on('data', 'printf');
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$process->stdout->on('error', 'printf');
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$loop->run();
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