zerog-grisu

We had such floating point printing performance issues in java once that i needed to implement a grisu variant that didn't fall into bignum calculations and had few other tweaks to short circuit the printing and improve some common cases. It made a decent impact especially on garbage generation (it was specifically zero gc). Since been ported to a couple other languages, and I was thinking of redoing it lately for another project and using the newer algo. https://github.com/jnordwick/zerog-grisu

Great links, thanks. I sometimes noodle with a faster printf for Java, mostly for giggles. I also found these: Dragon4 and Grisu3: Algoritms to Display Floating Point Numbers https://www.clarusft.com/dragon4-and-grisu3-algorithms-to-di... "Printing Floating-Point Numbers Quickly and Accurately with Integers" by Florian Loitsch http://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/pr... And its implementation in C https://github.com/google/double-conversion Here's a Java implementation of Grisu2 algorithm. https://github.com/jnordwick/zerog-grisu