programming w/ tiles means working w/ contiguous-ish blocks/squares of data, to minimise cache misses (often major bottleneck in gpu programming), so it's just

programming w/ tiles means working w/ contiguous-ish blocks/squares of data, to minimise cache misses (often major bottleneck in gpu programming), so it's just a nod to the fact that optimisations like these are included in the language or some such...