ESP32-C6 vs ESP32-S3
RV32IMAC (ESP32-C6) at 160 MHz against Xtensa LX7 (ESP32-S3) at 240 MHz, on real hardware, same C kernels, clocks verified.
ESP32-C6
RV32IMAC (ESP32-C6)
- Family
- RISC-V
- Board
- ESP32-C6-DevKitM-1
- Clock
- 160 MHz
- float / double
- 32-bit / 64-bit
ESP32-S3
Xtensa LX7 (ESP32-S3)
- Family
- Xtensa
- Board
- ESP32-S3 DevKit
- Clock
- 240 MHz
- float / double
- 32-bit / 64-bit
Typical gap
1.53×
ESP32-S3 faster, geometric mean of 30 cells
Biggest win for ESP32-C6
1.30×
uint64_t multiply
Biggest win for ESP32-S3
5.54×
float subtract
Clock for clock
1.02×
ESP32-S3 needs fewer cycles per op (1.50× clock gap)
Operation by operation
Every cell
How many times faster ESP32-C6 is than ESP32-S3, operations per second. Blue: ESP32-C6 ahead. Orange: ESP32-S3 ahead.
| Add | Subtract | Multiply | Divide | Modulo | |
|---|---|---|---|---|---|
| uint8_t | 1.01× 12.8 M/s · 12.7 M/s | 1.10× 14 M/s · 12.7 M/s | 1.10× 14 M/s · 12.7 M/s | 1/1.42× 8.1 M/s · 11.5 M/s | 1/1.34× 8.2 M/s · 10.9 M/s |
| uint16_t | 1/1.23× 10.3 M/s · 12.7 M/s | 1/1.23× 10.3 M/s · 12.7 M/s | 1/1.15× 11.1 M/s · 12.7 M/s | 1/1.38× 7.35 M/s · 10.1 M/s | 1/1.31× 7.43 M/s · 9.72 M/s |
| uint32_t | 1/1.04× 12.8 M/s · 13.4 M/s | 1/1.13× 11.9 M/s · 13.4 M/s | 1/1.13× 11.9 M/s · 13.4 M/s | 1/1.49× 7.35 M/s · 11 M/s | 1/1.41× 7.43 M/s · 10.5 M/s |
| uint64_t | 1.04× 8.2 M/s · 7.87 M/s | 1.11× 8.65 M/s · 7.81 M/s | 1.30× 7.1 M/s · 5.45 M/s | 1/1.78× 1.01 M/s · 1.8 M/s | 1/1.77× 986 k/s · 1.74 M/s |
| float | 1/5.28× 2.4 M/s · 12.7 M/s | 1/5.54× 2.29 M/s · 12.7 M/s | 1/4.70× 2.7 M/s · 12.7 M/s | 1/3.84× 905 k/s · 3.48 M/s | 1/2.03× 959 k/s · 1.95 M/s |
| double | 1/2.18× 1.39 M/s · 3.04 M/s | 1/2.06× 1.35 M/s · 2.79 M/s | 1/1.17× 1.7 M/s · 2 M/s | 1/1.05× 492 k/s · 516 k/s | 1/1.89× 647 k/s · 1.22 M/s |