Measure APDU time and memory

[Penneke]

Hi,

Now I've developed and Applet in javacard with JCIDE I want to know how much time (and memory if possible but less important) does it take an especific APDU to execute. I've been searching for a while without success. Is there any javacard code to measure time between 2 lines or does the debugger of JCIDE has this option? If not, Is there any way better to do it than executing the same APDU in loop a lot of times and divide time taken by the number of times?

Thank's in advance.

[UNKNwYSHSA]

Code: Select all

   public void process(APDU apdu)
   {
      if (selectingApplet())
      {
         return;
      }

      byte[] buf = apdu.getBuffer();
      switch (buf[ISO7816.OFFSET_INS])
      {
      case (byte)0x00:
         short result = 0;
         for (int i = 0; i < 500; ++i) {
         
         }
         apdu.setOutgoing();
         apdu.setOutgoingLength((short) 2);
         Util.setShort(buf, (short) 0, result);
         apdu.sendBytes((short) 0, (short) 2);
         break;
      case (byte)0x01:
         short result2 = 0;
         for (int i = 0; i < 500; ++i) {
            result2 += i;
         }
         apdu.setOutgoing();
         apdu.setOutgoingLength((short) 2);
         Util.setShort(buf, (short) 0, result2);
         apdu.sendBytes((short) 0, (short) 2);
         break;
      default:
         ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
      }
   }

Code: Select all

Download Cap begin...
Download Cap successful.
Install Applet begin...
Install Applet successful.
Select Applet begin...
Select Applet successful.
Send: 00 00 00 00 00
Recv: 00 00 90 00
Time used: 20.000 ms
Send: 00 01 00 00 00
Recv: E7 4E 90 00
Time used: 35.000 ms

Time spent by add instruction is about: (35 - 20) / 250.0 => 0.06ms

[Penneke]

Sorry UNKNwYSHSA but I can see where you measure the time with JCIDE. I took a picture running the code you provided so that you can check there is no time measure in the response. Can you tell me how I can make it to be displayed like you showed after the code?

[Penneke]

Ok, now I see I can use the pyApdutool together with JCIDE to send APDU's and measure time there (have been using only the JCIDE debugger command line). Thanks for ur help mate.