With this repository, developers, researchers, and hobbyists can easily compare and evaluate the performance of different microcontrollers for their specific applications. By providing a standardized benchmark suite, the repository simplifies the process of selecting the most suitable microcontroller based on performance requirements and constraints.
Comparative performance of functions executed on STM32 and ATMEGA328. Comparisons in microseconds (us).
| Function | STM32 | ATMEGA328 | STM32 performance gains |
|---|---|---|---|
| CPU Speed | 72Mhz | 16Mhz | Has an additional 56Mhz |
| digitalRead | 0.595 us | 4.918 us | 4.323 us faster |
| digitalWrite | 0.770 us | 4.543 us | 3.773 us faster |
| pinMode | 1.780 us | 4.353 us | 2.573 us faster |
| multiply byte | 0.113 us | 0.645 us | 532 us faster |
| divide byte | 0.112 us | 5.425 us | 5.313 us faster |
| add byte | 0.102 us | 0.455 us | 353 us faster |
| multiply integer | 0.087 us | 1.399 us | 1.312 us faster |
| divide integer | 0.100 us | 14.285 us | 14.185 us faster |
| add integer | 0.086 us | 0.896 us | 810 us faster |
| multiply long | 0.087 us | 6.115 us | 6.028 us faster |
| divide long | 0.100 us | 38.675 us | 38.575 us faster |
| add long | 0.086 us | 1.775 us | 1.689 us faster |
| multiply float | 0.993 us | 7.943 us | 6.950 us faster |
| divide float | 6.975 us | 80.150 us | 73.175 us faster |
| add float | 1.240 us | 10.120 us | 8.880 us faster |
| itoa | 1.620 us | 12.970 us | 11.350 us faster |
| dtostrf | 93.350 us | 79.000 us | 14.350 us slower |
| random | 1.500 us | 91.275 us | 89.775 us faster |
| analogRead | 6.900 us | 112.000 us | 105.100 us faster |
| analogWrite PWM | 4.350 us | 6.615 us | 2.265 us faster |
| delay(1) | 1001.000 us | 1007.500 us | 6.500 us faster |
| delay(100) | 100000.000 us | 100000.000 us | Same execution time |
| delayMicroseconds(2) | 2.043 us | 0.770 us | 1.273 us slower |
| delayMicroseconds(5) | 5.049 us | 3.789 us | 1.260 us slower |
| delayMicroseconds(100) | 100.250 us | 99.350 us | 900 us slower |