There are optimized apps for RakeSearch that make a huge difference - 5 to 10X improvement. They are located HERE

For AMD CPUs that support AVX2 use the opti that has avx2nopext in the name. Apparently there is an issue with the AMD implementation of AVX2 that keeps them from performing well with some AVX2 commands.

Just download the file you need, unpack it, and place the 2 files into your rakesearch project folder. Then stop/restart BOINC and you are good to go.