BenchMark for SSD1306

A new i2c driver is now available in ESP-IDF V5.2.
The previous i2c driver is still available as a Legacy driver.
We measured the performance of new i2c drivers, legacy i2c drivers, and SPI drivers.

Software requirements

ESP-IDF V4.4/V5.x.

Note for new i2c driver
ESP-IDF V5.2 is required when using the new i2c driver.

Installation

git clone https://github.com/nopnop2002/esp-idf-ssd1306
cd esp-idf-ssd1306/BenchMark/
idf.py set-target {esp32/esp32s2/esp32s3/esp32c2/esp32c3/esp32c6/esp32h2}
idf.py menuconfig
idf.py flash

i2c interface benchmark

The maximum i2c clock frequency of SSD1306 is 400KHz.
The i2c clock frequency used by this project is 400KHz.
The measurement result is [FPS].
Wire cables should be as short as possible.
For any SoCs, the New Driver achieved faster results than the Legacy Driver.

SoC@CPU Freq	Legacy Driver	New Driver
ESP32@160	34.0	35.2
ESP32@240	35.4	36.2
ESP32S2@160	36.7	37.8
ESP32S2@240	38.0	38.6
ESP32S3@160	36.1	37.3
ESP32S3@240	37.6	38.4
ESP32C2@120	36.2	37.1	26MHz XTAL
ESP32C3@160	37.0	38.1
ESP32C6@160	37.1	38.2
ESP32H2@96	34.6	36.4

ESP32C6 gave the fastest results when the CPU frequency was 160MHz (120MHz or 96MHz for some SoCs).
The difference between ESP32C6 and ESP32C3 is very small.

ESP32S2 gave the fastest results when the CPU frequency was 240MHz.

SPI interface benchmark

The maximum SPI clock frequency of SSD1306 is 10MHz.
Measurements were made by changing the SPI clock frequency.
The measurement result is [FPS].
Wire cables should be as short as possible.

SoC@CPU Freq	1MHz	2MHz	4MHz	6MHz	8MHz	10MHz
ESP32@160	90.3	143.8	224.6	272.0	297.0	316.3
ESP32@240	97.4	166.0	271.3	339.2	378.9	417.2
ESP32S2@160	94.5	159.4	244.4	301.0	331.8	356.0
ESP32S2@240	101.7	174.1	290.1	367.1	413.9	458.9
ESP32S3@160	93.7	152.2	240.7	295.0	324.4	347.5
ESP32S3@240	100.1	172.9	286.0	360.9	411.2	449.1
ESP32C2@120	91.6	150.7	226.7	263.5	295.5	314.5	26MHz XTAL
ESP32C3@160	98.0	164.2	265.5	328.1	365.0	394.6
ESP32C6@160	98.2	164.9	268.0	331.9	369.6	399.8
ESP32H2@96	86.6	139.1	202.8	235.5	256.1	267.9

ESP32C6 gave the fastest results when the CPU frequency was 160MHz (120MHz or 96MHz for some SoCs).
ESP32C3 is the next fastest.
The difference between ESP32C6 and ESP32C3 is very small.