cudaBlockTest

cuda speed up demo,select applicable blockDim.x and blockDim.y running in windows, vs2019,cuda 11.1

three is two situation:

1、blockDim.x=32, blockDim.y=32

2、blockDim.x=1024, blockDim.y=1

result: situation 2 is faster in my computer(NVIDIA GeFore RTX 2060)