Arduino UNO
IDE 1.8.19

fastShiftIn_test.ino
0.3.2

 8 bits HIGH


Performance - time in us : read()
FastShiftIn1: 21.62
FastShiftIn2: 42.11
       Delta: 20.49


Performance - time in us : read16()
FastShiftIn1: 41.70
FastShiftIn2: 82.73
       Delta: 41.04


Performance - time in us : read24()
FastShiftIn1: 63.58
FastShiftIn2: 126.49
       Delta: 62.91


Performance - time in us : read32()
FastShiftIn1: 83.95
FastShiftIn2: 167.24
       Delta: 83.29


Performance - time in us : readLSBFIRST()
FastShiftIn1: 20.68
FastShiftIn2: 40.61
       Delta: 19.93


Performance - time in us : readMSBFIRST()
FastShiftIn1: 20.68
FastShiftIn2: 40.60
       Delta: 19.92


Performance - time in us : reference shiftIn()
Standard shiftIn1: 108.99
Standard shiftIn2: 217.19
            Delta: 108.20
