OpenCL-examples

In the link provided, the CUDA example only show the compute kernel itself and not the boilerplate required to run it. On the other hand, your OpenCL example only show the boilerplate. This is the OpenCL kernel from the same repo, for a more fair comparison: https://github.com/rsnemmen/OpenCL-examples/blob/master/mand... This is much more readable. OpenCL-C the language is fine: it's how you deploy the program on the cards that is complicated with opencl.

If you ever get the chance to write something in OpenCL and then in CUDA I promise you will understand immediately why Google didn't push for it. There is a lot more boilerplate to it, read/write to the buffer, queueing being handled explicitly. Here's an example that illustrate what I mean: https://github.com/rsnemmen/OpenCL-examples/blob/master/mand... For comparison here is an implementation in CUDA: http://selkie.macalester.edu/csinparallel/modules/CUDAArchit... Notice how the CUDA code is more readable.