a different timestamp profile for programs executed from ram or from onint ( flash)

I did a check executing a same program from ( downloading from the Web IDE ) or from FLASH using the USB console.
I obtained that the version executed after downloading from Flash onInit() runs twice as much as it would.
I set a led flashing at 1 Hz.
It flashed at 1 Hz when executing after a reset() and at 2Hz when executing after onInit()

function SD_flash(op) {
   if ( op == "start") {
     if ( SD_TIM === undefined ) {
       console.log("SD_TIM");
       SD_TIM = setInterval(function() {
          sd_on = !sd_on; if (sd_on) { STOP.set(); } else {STOP.reset();}}, 1000);
     }
   }
   if ( op == "stop") {
     if (SD_TIM !== undefined) { clearInterval(SD_TIM); SD_TIM=undefined; setTimeout(function(){STOP.reset();},1000); }
   }
}

The same happens for characters received fron an external part and sampled every 100 ms in a state machine loop.
IS there a reason for this behaviour ?

Thanks in advance for the reply.

Please find attached below the profiling.

reset();
=undefined
 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v63 Copyright 2014 G.Williams
>echo(0);
=undefined
ERROR: Unable to mount SD card : NOT_READY
SD_TIM
UART5: ARF54 Command mode request.
Received 0
Elapsed: 200 ms
STEP 1
Elapsed: 300 ms
STEP 2
Elapsed: 700 ms
Received 0
Elapsed: 700 ms
STEP 3
Elapsed: 800 ms
Received 0
Elapsed: 900 ms
STEP 4
Elapsed: 1100 ms
Received 0
Elapsed: 1200 ms
STEP 5
Elapsed: 1300 ms
Received 0
Elapsed: 1400 ms
STEP 6
Elapsed: 1700 ms
Received 0
Elapsed: 1700 ms
STEP 7
Elapsed: 1800 ms
Received 0
Elapsed: 1900 ms
STEP 8
Elapsed: 2000 ms
Received 0
Elapsed: 2100 ms
STEP 9
Elapsed: 2200 ms
Received 0
Elapsed: 2300 ms
STEP 10
Elapsed: 2400 ms
Received 0
Elapsed: 2700 ms
END OF SEPRI INIT SEQUENCE.
Elapsed: 2700 ms

UART5: ARF54 Command mode request.
Received 0
Elapsed: 200 ms
STEP 1
Elapsed: 300 ms
STEP 2
Elapsed: 700 ms
Received 0
Elapsed: 800 ms
STEP 2
Elapsed: 800 ms
Received 0
Elapsed: 900 ms
STEP 3
Elapsed: 900 ms
Received 0
Elapsed: 1000 ms
STEP 4
Elapsed: 1100 ms
Received 0
Elapsed: 1200 ms
STEP 5
Elapsed: 1300 ms
Received 0
Elapsed: 1400 ms
STEP 6
Elapsed: 1500 ms
Received 0
Elapsed: 1800 ms
STEP 6
Elapsed: 1800 ms
STEP 7
Elapsed: 1800 ms
Received 0
Elapsed: 1800 ms
STEP 8
Elapsed: 1900 ms
Received 0
Elapsed: 2000 ms
STEP 9
Elapsed: 2100 ms
Received 0
Elapsed: 2200 ms
STEP 10
Elapsed: 2300 ms
Received 0
Elapsed: 2400 ms
END OF SEPRI INIT SEQUENCE.
Elapsed: 2500 ms

UART5: ARF54 Command mode request.
Received 0
Elapsed: 400 ms
STEP 1
Elapsed: 2700 ms
STEP 1
Elapsed: 3000 ms
STEP 2
Elapsed: 3100 ms
Received 0
Elapsed: 3200 ms
STEP 3
Elapsed: 3300 ms
Received 0
Elapsed: 3400 ms
STEP 4
Elapsed: 3600 ms
Received 0
Elapsed: 3700 ms
STEP 5
Elapsed: 4000 ms
Received 0
Elapsed: 4100 ms
STEP 5              RICHIESTA RIPETUTA DA NIC.
Elapsed: 4100 ms
Received 0
Elapsed: 4200 ms
STEP 6
Elapsed: 4200 ms
Received 0
Elapsed: 4300 ms
STEP 7
Elapsed: 4300 ms
Received 0
Elapsed: 4400 ms
                  <— SALTATO UNO STEP, ovvero una inizializzazione
STEP 9
Elapsed: 4500 ms
Received 0
Elapsed: 4600 ms
STEP 10
Elapsed: 4700 ms
Received 0
Elapsed: 4800 ms
END OF SEPRI INIT SEQUENCE.
Elapsed: 5000 ms


UART5: ARF54 Command mode request.
Received 0
Elapsed: 200 ms
STEP 1
Elapsed: 300 ms
STEP 2
Elapsed: 500 ms
Received 0
Elapsed: 700 ms
STEP 3
Elapsed: 800 ms
STEP 3
Elapsed: 2100 ms  <— QUI SI INTERROMPE


>save()
=undefined
Erasing Flash...
Programming 109000 Bytes..............................................................................................................
Checking...
Done!
Running onInit()...
ERROR: Unable to mount SD card : NOT_READY
SD_TIM
UART5: ARF54 Command mode request.
Received 0
Elapsed: 0 ms
STEP 1
Elapsed: 0 ms
STEP 2
Elapsed: 200 ms
Received 0
Elapsed: 200 ms
STEP 3
Elapsed: 300 ms
Received 0
Elapsed: 300 ms
STEP 4
Elapsed: 500 ms
Received 0
Elapsed: 500 ms
STEP 5
Elapsed: 600 ms
Received 0
Elapsed: 600 ms
STEP 6
Elapsed: 700 ms
Received 0
Elapsed: 700 ms
STEP 7
Elapsed: 800 ms
Received 0
Elapsed: 1000 ms
STEP 7
Elapsed: 1000 ms
STEP 7
Elapsed: 1000 ms
Received 0
Elapsed: 1000 ms
STEP 8
Elapsed: 1000 ms
Received 0
Elapsed: 1000 ms
STEP 9
Elapsed: 1000 ms
STEP 10
Elapsed: 1000 ms
Received 0
Elapsed: 1100 ms
END OF SEPRI INIT SEQUENCE.
Elapsed: 1200 ms

UART5: ARF54 Command mode request.
Received 0
Elapsed: 100 ms
STEP 1
Elapsed: 200 ms
STEP 2
Elapsed: 300 ms
Received 0
Elapsed: 300 ms
STEP 3
Elapsed: 400 ms
Received 0
Elapsed: 400 ms
STEP 4
Elapsed: 700 ms
Received 0
Elapsed: 700 ms
STEP 5
Elapsed: 700 ms
Received 0
Elapsed: 800 ms
STEP 6
Elapsed: 900 ms
Received 0
Elapsed: 900 ms
STEP 7
Elapsed: 1000 ms
Received 0
Elapsed: 1000 ms
STEP 8
Elapsed: 1100 ms
Received 0
Elapsed: 1100 ms