Feather M4 vs Arduino Uno
Cortex-M4F (SAMD51) at 120 MHz against ATmega328P at 16 MHz, on real hardware, same C kernels, clocks verified.
Feather M4
Cortex-M4F (SAMD51)
- Family
- Arm Cortex-M
- Board
- Feather M4 Express
- Clock
- 120 MHz
- float / double
- 32-bit / 64-bit
Typical gap
41.8×
Feather M4 faster, geometric mean of 30 cells
Biggest win for Feather M4
263×
uint32_t divide
Closest cell
4.14×
double modulo
Clock for clock
5.58×
Feather M4 needs fewer cycles per op (7.50× clock gap)
Operation by operation
Every cell
How many times faster Feather M4 is than Arduino Uno, operations per second. Blue: Feather M4 ahead. Orange: Arduino Uno ahead.
| Add | Subtract | Multiply | Divide | Modulo | |
|---|---|---|---|---|---|
| uint8_t | 18.3× 8.98 M/s · 490 k/s | 18.3× 8.98 M/s · 490 k/s | 20.0× 8.98 M/s · 448 k/s | 49.3× 7.01 M/s · 142 k/s | 44.7× 6.36 M/s · 142 k/s |
| uint16_t | 17.2× 8.98 M/s · 522 k/s | 17.2× 8.98 M/s · 522 k/s | 21.7× 8.98 M/s · 413 k/s | 88.0× 6.12 M/s · 69.5 k/s | 77.2× 5.36 M/s · 69.5 k/s |
| uint32_t | 28.3× 9.71 M/s · 342 k/s | 28.4× 9.71 M/s · 342 k/s | 71.9× 9.71 M/s · 135 k/s | 263× 6.53 M/s · 24.8 k/s | 250× 6.19 M/s · 24.8 k/s |
| uint64_t | 83.1× 6.19 M/s · 74.6 k/s | 83.1× 6.19 M/s · 74.6 k/s | 156× 5.61 M/s · 35.9 k/s | 57.9× 885 k/s · 15.3 k/s | 58.2× 885 k/s · 15.2 k/s |
| float | 91.4× 8.98 M/s · 98.3 k/s | 90.9× 8.98 M/s · 98.7 k/s | 103× 8.98 M/s · 87 k/s | 147× 4.73 M/s · 32.2 k/s | 8.43× 866 k/s · 103 k/s |
| double | 12.2× 1.2 M/s · 98.1 k/s | 12.1× 1.19 M/s · 98.6 k/s | 19.6× 1.7 M/s · 86.8 k/s | 39.1× 1.26 M/s · 32.2 k/s | 4.14× 425 k/s · 103 k/s |