Hi, On 2018-09-26 17:57:05 -0700, Andres Freund wrote: > snprintf time = 1324.87 ms total, 0.000264975 ms per iteration > pg time = 1434.57 ms total, 0.000286915 ms per iteration > stbsp time = 552.14 ms total, 0.000110428 ms per iteration
Reading around the interwebz lead me to look at ryu https://dl.acm.org/citation.cfm?id=3192369 https://github.com/ulfjack/ryu/tree/46f4c5572121a6f1428749fe3e24132c3626c946 That's an algorithm that always generates the minimally sized roundtrip-safe string output for a floating point number. That makes it insuitable for the innards of printf, but it very well could be interesting for e.g. float8out, especially when we currently specify a "too high" precision to guarantee round-trip safeity. Greetings, Andres Freund
