[qop]

To hijack this thread a different direction for a moment, is this type of change one that would be allowed to occur in 1.x? How is it determined what changes are suitable for 1.x and what will wait for 2.0, once 1.0 is released?

I'm very interested in how detailed and coordinated the Julia team has become regarding the longer term future of Julia. Admirable effort all around.

[KenoFischer]

I'd say probably yes. Changes are suitable for 1.x if they are not generally breaking for user code. This change probably wouldn't be considered breaking, but we'd have to look at it at the time.

[ulfjack]

FYI: Grisu2 and Ryu should produce bit-identical outputs in all cases.