define("BAILOUT",16);define("MAX_ITERATIONS",1000);class Mandelbrot{ function Mandelbrot() { $d1 = microtime(1); for ($y = -39; $y < 39; $y++) { for ($x = -39; $x < 39; $x++) { if ($this->iterate($x/40.0,$y/40.0) == 0) echo("*"); else echo(" "); } echo("\n"); } $d2 = microtime(1); $diff = $d2 - $d1; printf("\nPHP Elapsed %0.3f\n", $diff); } function iterate($x,$y) { $cr = $y-0.5; $ci = $x; $zr = 0.0; $zi = 0.0; $i = 0; while (true) { $i++; $temp = $zr * $zi; $zr2 = $zr * $zr; $zi2 = $zi * $zi; $zr = $zr2 - $zi2 + $cr; $zi = $temp + $temp + $ci; if ($zi2 + $zr2 > BAILOUT) return $i; if ($i > MAX_ITERATIONS) return 0; } }}ob_start();$m = new Mandelbrot();ob_end_flush();、

此代码测试cpu在不用php版本下的执行速度