PHPの簡単ベンチマーク ref: http://qiita.com/koriym/items/0c8987faecc2782f2c8a

file0.php

$time = microtime(true);
register_shutdown_function(
    function() use ($time) {
        printf("Memory: %s / %s bytes\nTime: %f ms\nDeclared: %d classes\nIncluded: %d files > include_files.txt\n",
            number_format(memory_get_usage()),
            number_format(memory_get_peak_usage()),
            (microtime(true) - $time) * 1000,
            count(get_declared_classes()),
            count(get_included_files())
        );
        file_put_contents(__DIR__ . '/include_files.txt', print_r(get_included_files(), true));

    }
);