SIMD-accelerated computer vision on a $2 microcontroller

A developer created a SIMD-accelerated FAST feature detector for the ESP32-S3 microcontroller, achieving roughly double the performance of reference implementations while processing QVGA frames in around 6 milliseconds. The project involved learning assembly programming on the ESP32-S3 and developing a custom register allocator to work around the chip's limitations, demonstrating practical computer vision capabilities on a low-cost ($2) microcontroller with limited but functional SIMD instructions.