Speed ​​up displaying images

[BimoSora2]

I hope that the process of displaying images can be accelerated, I have set the SPI to 70MHz but it still isn't fast.

[Voss-Leonard]

I think the speed is also very much dependent on the source of your image, among other things. SD cards, for example, are much slower than using flash memory.

[BimoSora2]

I use littlefs, the image update speed on the st7735 lcd is very slow even though the spi is set to 70MHz. My LCD size is 160x128, the image uses 32 bit BMP format, the microcontroller is ESP32 Wroom 32. I want to be as good as the cheap Smartwatch that costs under $ 20 can make a background image for the watch face