SIMD-accelerated computer vision on a $2 microcontroller shraiwi.com

Developer Shraiwi built a SIMD-accelerated FAST feature detector for the ESP32-S3 microcontroller, using its 128-bit instructions and workarounds for limitations in pixel alignment and signed comparisons. In testing, it raised throughput from 5.1 to 11.2 megapixels per second—about 2.2 times faster—and processed a 320×240 frame in roughly 6 milliseconds.