--TEST-- Concatenating many small strings should not slowdown allocations --SKIPIF-- <?php if (PHP_DEBUG) { die ("skip debug version is slow"); } ?> --FILE-- <?php $time = microtime(TRUE); /* This might vary on Linux/Windows, so the worst case and also count in slow machines. */ $t_max = 1.0; $datas = array_fill(0, 220000, [ '000.000.000.000', '000.255.255.255', '保留地址', '保留地址', '保留地址', '保留地址', '保留地址', '保留地址', ]); $time = microtime(TRUE); $texts = ''; foreach ($datas AS $data) { $texts .= implode("\t", $data) . "\r\n"; } $t = microtime(TRUE) - $time; var_dump($t < $t_max); ?> +++DONE+++ --EXPECT-- bool(true) +++DONE+++