OpenCV minimum required 3.4.0
The demo base on OpenCV DNN module. my computer with Intel i7 7700 can achicive 100fps+ (1920*1080 minSize 60)compiled with OpenBLAS (OpenCV 3.4.2) ,if you wanna achieve the better performance.you can compile with Intel MKL-DNN Inference Engine package to accelerate.
References: https://github.com/szad670401/Fast-MTCNN