fast_double_parser

It has about 15 KB of data: 10KB in power_of_ten_components and 5KB in mantissa_128. [1] That's ~23% of the per-core L1 data cache on (eg) the recently announced APU chip. [2, 3] So before getting too excited about the microbenchmark numbers, I'd be careful to ensure the additional cache pressure doesn't slow down my program as a whole. edit: also, ~2.5KB of that is due to padding in power_of_ten_components. I wonder if it'd be better to split the uint64_t field into two uint32_ts to avoid this. [1] https://github.com/lemire/fast_double_parser/blob/master/inc... [2] https://news.ycombinator.com/item?id=22440894 [3] https://en.wikichip.org/wiki/amd/ryzen_embedded/r1606g