“Floating-Point Printing and Parsing Can Be Simple And Fast”
The fastest known floating-point printer and parsing algorithms - fixed-width printing, shortest-width printing, and parsing, all in 400 lines of Go.
research.swtch.com/fp
research.swtch.com/fp-proof
https://research.swtch.com/fp
research!rsc: Floating-Point Printing and Parsing Can Be Simple And Fast (Floating Point Formatting, Part 3)