Beta4 release: https://github.com/fancyIX/sgminer-phi2-branch/releases/tag/5.6.1.3.b4. About 40% faster on my rx 580 and vega 56 cards. The speed is improved using pre-built binary kernels. They are only used if you use "-w 256". Please don't delete them otherwise new kernel will be compiled from source code and will be slower than those pre-built kernel. Please help test if interested.