User blog comment:Dr. Ivo Robotnik/Weird performance issue/@comment-231265-20160819171449

The issue is that minecraft is a single-core game, and that an individual core of your A8 APU is only slightly better than an individual core of the Athlon 64 X2. In addition, laptops have always had weird bottlenecks related to minecraft in my experience, so your "modern" laptop is actually worse for minecraft than a 2004 PC, due to various things like thermal limits and limitations of laptop hardware. If I had to make a guess though, the prime suspect would be that the graphics processor in the laptop is inferior to the one in your PC, based on your experience that it "runs a lot slower".