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<?php $x = str_repeat('foo', 500000); $y = 'bar'; // $before = microtime(1); $x . $y; // printf('%f'."\n", microtime(1) - $before); // $x = str_repeat('foo', 500000); // $y = 'bar'; // $before = microtime(1); $x .= $y; // printf('%f'."\n", microtime(1) - $before);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/sPacu on line 20
Process exited with code 255.

preferences:
251.38 ms | 401 KiB | 425 Q