I changed my OS to Ubuntu after seeing my GPU is working properly. Minecraft Version 1.8.9 Optifine Installed All low or disabled except fast render, fast math etc. FPS 40-60 Sometimes Drop To 10 For Half A Second. Using OpenJDK-JRE 8. Launcher command :
DRI_PRIME=1 sudo java -jar launcher.jar
Tried with and without sudo same performance. Smooth FPS disabled makes FPS low. System Info: Intel I3 6006U / HD Graphics 520 / AMD Radeon R5 M330 / 3.6 GB RAM (-Xmx1532M)
Minecraft uses GPU. GPU driver radeon. Never Tried amdgpu. Don't know how to use it.