How to optimize php(CRON) code?

Question

Task Schedulers

We have a website hosted by TimeWeb and we received messages not long ago

Dear Customer!
Our specialists recorded a high load on the server when executing the script *******/myCron.php.
We were forced to remove the rights to the file, in order for it not to run, please optimize the work of this script to reduce the generated load.

Here is myCron.php script

function cron()
  {
    $url = "https://royal.nurshifo.ru/cron.php";
    $ch = curl_init();
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
    curl_setopt($ch,CURLOPT_POSTFIELDS,http_build_query(""));
    $res = curl_exec($ch);
    if(curl_error($ch))
      { 
        var_dump(curl_error($ch));
      }
    else
      { 
        return json_decode($res);
      } 
  }
echo "s"; 
for($i=0 ; $i<20 ; $i++){
cron();
sleep(3);
}

The question is the same, how can this script be optimized!? The court is that cron.php would work every 2 seconds and we created a cron task for every minute in myCron and delayed the script there for 60 seconds

Answer 1

Take the UPU, and no one will write such messages.
this script does not look like some problematic one, it just constantly hangs in work, maybe that's why they don't like it.