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Default is first at switch
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FLASH-                        RAM                Speed+

 

If there is a default used inside the switch then it should be the first “case“ in order to avoid internal “goto default” instruction. It might in some cases produce shorter and faster code.

 

switch ( DLEN )

{

  case 12:

       return 21;

 

  case 34:

       return 43;

 

  default:

       return 0;

}

switch ( DLEN )

{

  default:

       return 0;

 

  case 12:

       return 21;

 

  case 34:

       return 43;

}