Firmware (C8051F320)
                  code   data   xdata (bytes)
SiLabs
Original  (Keil)  2990   181.0      0
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Optimized (Keil)  2305   163.1      0  inline POLL_READ and POLL_WRITE
Optimized (SDCC)  2502   163        0
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Optimized (Keil)  2197   166.1      0  function POLL_READ and POLL_WRITE
Optimized (SDCC)  2494   167        0