Its actually suprisingly fast for Basic programming
I've made some really powerful programs that dont lag one bit
But its a bit bad at 3D rendering, performance i mean
Theres a few 3d engines out there that try to fix the lag, but it will never be able to run a non laggy minecraft without the view distance being 5 blocks
you can increase the quality
the lower the number the better the graphics...
but...you do loose allot of fps
with HQ graphics here is the quality on max
yeah.....its....laggy