Feather M4 vs ESP32-C6
Cortex-M4F (SAMD51) at 120 MHz against RV32IMAC (ESP32-C6) at 160 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
ESP32-C6
RV32IMAC (ESP32-C6)
- Family
- RISC-V
- Board
- ESP32-C6-DevKitM-1
- Clock
- 160 MHz
- float / double
- 32-bit / 64-bit
Typical gap
1.03×
Feather M4 faster, geometric mean of 30 cells
Biggest win for Feather M4
5.23×
float divide
Biggest win for ESP32-C6
1.56×
uint8_t subtract
Clock for clock
1.38×
Feather M4 needs fewer cycles per op (1.33× clock gap)
Operation by operation
Every cell
How many times faster Feather M4 is than ESP32-C6, operations per second. Blue: Feather M4 ahead. Orange: ESP32-C6 ahead.
| Add | Subtract | Multiply | Divide | Modulo | |
|---|---|---|---|---|---|
| uint8_t | 1/1.43× 8.98 M/s · 12.8 M/s | 1/1.56× 8.98 M/s · 14 M/s | 1/1.56× 8.98 M/s · 14 M/s | 1/1.15× 7.01 M/s · 8.1 M/s | 1/1.29× 6.36 M/s · 8.2 M/s |
| uint16_t | 1/1.15× 8.98 M/s · 10.3 M/s | 1/1.15× 8.98 M/s · 10.3 M/s | 1/1.23× 8.98 M/s · 11.1 M/s | 1/1.20× 6.12 M/s · 7.35 M/s | 1/1.39× 5.36 M/s · 7.43 M/s |
| uint32_t | 1/1.32× 9.71 M/s · 12.8 M/s | 1/1.22× 9.71 M/s · 11.9 M/s | 1/1.22× 9.71 M/s · 11.9 M/s | 1/1.12× 6.53 M/s · 7.35 M/s | 1/1.20× 6.19 M/s · 7.43 M/s |
| uint64_t | 1/1.32× 6.19 M/s · 8.2 M/s | 1/1.40× 6.19 M/s · 8.65 M/s | 1/1.26× 5.61 M/s · 7.1 M/s | 1/1.14× 885 k/s · 1.01 M/s | 1/1.11× 885 k/s · 986 k/s |
| float | 3.74× 8.98 M/s · 2.4 M/s | 3.92× 8.98 M/s · 2.29 M/s | 3.33× 8.98 M/s · 2.7 M/s | 5.23× 4.73 M/s · 905 k/s | 1/1.11× 866 k/s · 959 k/s |
| double | 1/1.17× 1.2 M/s · 1.39 M/s | 1/1.14× 1.19 M/s · 1.35 M/s | 1.00× 1.7 M/s · 1.7 M/s | 2.56× 1.26 M/s · 492 k/s | 1/1.52× 425 k/s · 647 k/s |