On: FastDoubleParser: Java port of Daniel Lemires fast...

[thangalin]

Ryū algorithm, the converse (doubles to strings), is also much faster than using Java's number formatting classes.

https://github.com/ulfjack/ryu/blob/master/src/main/java/inf...

Aside, my JMathTeX fork uses Ryū to achieve real-time rendering of TeX in Java.

https://github.com/DaveJarvis/JMathTeX/