60 lines
1.7 KiB
PHP
60 lines
1.7 KiB
PHP
<?php
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use React\EventLoop\Factory;
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use React\ChildProcess\Process;
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use React\Stream\Stream;
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require __DIR__ . '/../vendor/autoload.php';
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$loop = Factory::create();
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$info = new React\Stream\WritableResourceStream(STDERR, $loop);
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$info->write('Pipes data through process STDIN and reads STDOUT again' . 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('cat');
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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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// 10000 * 100 KB => 1 GB
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$i = 10000;
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$chunk = str_repeat("\0", 100 * 1000);
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$write = function () use ($chunk, $process, &$i, &$write) {
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do {
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--$i;
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$continue = $process->stdin->write($chunk);
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} while ($i && $continue);
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if ($i > 0) {
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// buffer full => wait for drain to continue
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$process->stdin->once('drain', $write);
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} else {
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$process->stdin->end();
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}
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};
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$write();
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// print stream position once process exits
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$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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$process->stdout->on('error', 'printf');
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$process->stderr->on('data', 'printf');
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$process->stdout->on('error', 'printf');
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$loop->run();
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