Optimizing string concatenation and integer to string conversion

[Lindley]

PMs must be disabled by default, I never touched that setting. Rather silly board setting, but whatever.

The GPU thing was just one example of how speed can be a design concern early on. Perhaps a more relevant one is big-oh running time of the selected algorithms. And perhaps "design" isn't even the right word.....I'm not talking high-level conceptual stuff. I'm talking about the thought process prior to writing an implementation.

Oh, and for the record GPUs can handle running multiple programs at once, although there can be major slowdowns if you exceed the available memory (of course) or simply if there are frequent context switches.