If you're on Windows, you could write a JavaScript application that calls perl every second.

Save this as "something.hta" on your desktop and open it in Notepad. You will have to edit the location of the perl interpreter and the location of your perl script within the code. And then simply double-click on the JavaScript program and click on Start. This can also display the exact millisec when perl was executed, but I've noticed that it's not exactly 1 second. It's always 10 ms more. But you can adjust for that by calling the script every 990ms instead of 1000. 

<HTML>
<BODY onLoad="Init();">
<INPUT TYPE=BUTTON VALUE="START" onClick="Start();">
<INPUT TYPE=BUTTON VALUE="STOP" onClick="Stop();">


<SCRIPT>

// I have tested this. It works.

function Init()
{
  WScript = new ActiveXObject("WScript.Shell");
  RUNNING = 0;
  document.title = "INACTIVE";
}

function RunPerl()
{
/*
  var T = new Date();
  document.title = T.getTime();  // SHOW MILLISECONDS IN THE WINDOW TI
+TLE BAR
*/
  WScript.Run('C:\\BIN\\PERL\\tinyperl.exe K:\\DESKTOP\\myscript.pl');
}

function Start()
{
  if (!RUNNING)
    RRR = setInterval(RunPerl, 1000);  // 1000 ms delay
  RUNNING = 1;
  document.title = "RUNNING";
}

function Stop()
{
  if (RUNNING)
    clearInterval(RRR);
  RUNNING = 0;
  document.title = "STOPPED";
}

</SCRIPT>

[download]

In reply to Re: The most precise second (timer) by harangzsolt33
in thread The most precise second (timer) by tukusejssirs

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