esp-idf-benchmark

Dhrystone/Whetstone benchmark for esp-idf.
I wanted to know the computing power of the ESP32-C3.

Dhrystone Benchmark

I ported from here.

Whetstone Benchmark

I ported from here.

Supported versions of frameworks

Chip	Framework	Versions
ESP8266	ESP8266 RTOS SDK	v3.x
ESP32	ESP-IDF	v5.1
ESP32-S2	ESP-IDF	v5.1
ESP32-S3	ESP-IDF	v5.1
ESP32-C3	ESP-IDF	v5.1
ESP32-C2	ESP-IDF	v5.1
ESP32-C6	ESP-IDF	v5.1
ESP32-H2	ESP-IDF	v5.1

Installation for ESP8266

git clone https://github.com/nopnop2002/esp-idf-benchmark
cd esp-idf-benchmark/
make menuconfig(*1)
make flash monitor

(*1)
You have to change this config.

Installation for ESP32

git clone https://github.com/nopnop2002/esp-idf-benchmark
cd esp-idf-benchmark/
idf.py set-target {esp32/esp32s2/esp32s3/esp32c2/esp32c3/esp32c6/esp32h2}
idf.py menuconfig
idf.py flash monitor

Compiler Version

ESP8266

$ xtensa-lx106-elf-gcc --version
xtensa-lx106-elf-gcc (crosstool-NG esp-2020r3-49-gd5524c1) 8.4.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

ESP32

$ xtensa-esp32-elf-cc --version
xtensa-esp32-elf-cc (crosstool-NG esp-12.2.0_20230208) 12.2.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

ESP32-S2

$ xtensa-esp32s2-elf-cc --version
xtensa-esp32s2-elf-cc (crosstool-NG esp-12.2.0_20230208) 12.2.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

ESP32-S3

$ xtensa-esp32s3-elf-cc --version
xtensa-esp32s3-elf-cc (crosstool-NG esp-12.2.0_20230208) 12.2.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

ESP32-C2/C3/C6/H2

$ riscv32-esp-elf-cc --version
riscv32-esp-elf-cc (crosstool-NG esp-12.2.0_20230208) 12.2.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Benchmark with Og compile option(default).

SoC	Freq(Mhz)	Dhrystone(MIPS)	Whetstone(MIPS)
ESP8266	160	57	6.2
ESP32	160	95	10.0
ESP32	240	142	16.7
ESP32S2	160	95	8.3
ESP32S2	240	142	12.5
ESP32S3	160	142	10.0
ESP32S3	240	190	14.3
ESP32C3	160	167	8.3
ESP32C2	120	142	8.3	26MHz XTAL
ESP32C6	160	178	12.5
ESP32H2	96	142	5.3

How to set O2 compile option

The default compile option for esp-idf is Og.
Compile options can be changed in the CMakeLists.txt or menuconfig.
On the ESP32, Changing the compile option to [O2] enables [zero-overhead loops].
zero-overhead loops can execute a loop with a predetermined number of executions without branching overhead.

Benchmark with O2 compile option enabled.

SoC	Freq(Mhz)	Dhrystone(MIPS)	Whetstone(MIPS)
ESP32	160	203	33.3
ESP32	240	316	50.0
ESP32S2	160	178	25.0
ESP32S2	240	283	33.3
ESP32S3	160	237	25.0
ESP32S3	240	356	50.0
ESP32C3	160	407	20.0
ESP32C2	120	356	20.0	26MHz XTAL
ESP32C6	160	474	25.0
ESP32H2	96	237	12.5