Other comments have already deconstructed much of the article, but I'll add this. The primary factor will be your CPU architecture. Can you put the string in th

Other comments have already deconstructed much of the article, but I'll add this. The primary factor will be your CPU architecture. Can you put the string in the same cacheline as the code or an adjacent cacheline? If so, awesome. However, if you have a microcontroller with a harvard architecture, such as a cortex M3, it's may be better to put your strings in data memory rather than code memory. The processor can simultaneously load your string and the next instructions via the two memory ports.