I apply comet long polling which uses usleep inside while loop until no new data returned by server like below:PHP      while ($currentmodif <= $lastmodif)         {          usleep(10000); // sleep 10ms to unload the CPU          clearstatcache();          $currentmodif = filemtime($filename);        }My ajax call has timeout specified:    jquery              var timeout = 120;              jQuery.ajax({                   method: POST,                   url: /index.php,                   timeout: 1000* timeout, // 1000  1 sec                   data: data2,                   error: function() {                     console.debug('error');                   },                     success: function(result) {                    ..........code cut for brevity...so when the while loop reaches php.ini max_execution_time, ajax will timeout and start a new connection.This works well thus far. My only concern is will this method eat up disk space or slow down the system's performance? If yes, how to overcome it..Please don't advise to shift to websocket as I don't own the server..so I can't make any changes to it..
Will comet long polling slow down the system performance regardless of the server it's hosted on?
ajax;comet