PHP函数curl_exec（）减慢我的剧本

我用下面的函数笨，让我的最新的tweet：PHP函数curl_exec（）减慢我的剧本

function tweet($id) { 

     $c = curl_init(); 
     curl_setopt($c, CURLOPT_URL, "http://twitter.com/statuses/user_timeline/".$id.".xml?count=1"); 

     curl_setopt($c, CURLOPT_RETURNTRANSFER, 1); 

     //Benchmark starts here 
     $src = curl_exec($c); 
     //Benchmark ends here 

     curl_close($c); 

     preg_match('/<text>(.*)<\/text>/', $src, $t); 
     $data['tweet'] = htmlentities($t[1]); 
     preg_match('/<created_at>(.*)<\/created_at>/', $src, $c); 
     $created = $c[1]; 

     // explode $created so we can process it 
     $created_array = explode(' ',$created); 
     $time = $created_array[3]; 
     $time_array = explode(':',$time); 
     $format = '%b/%d/%Y %H:%M'; 
     $date_to_format = $created_array[1].'/'.$created_array[2].'/'.$created_array[5].' '.$time_array[0].':'.$time_array[1]; 
     $date_time = strptime($date_to_format,$format); 
     $created_timestamp = mktime($date_time['tm_hour'], $date_time['tm_min'], 0, $date_time['tm_mon']+1, $date_time['tm_mday'], $date_time['tm_year']+1900); 
     $time_diff = time() - $created_timestamp; 

     $data['time'] = time_since($time_diff); 

     return $data; 

    }

我使用Benchmark类CI的看出为什么网站需要很长时间来响应，我发现该行