Is just multiplying PI by 2 best for precision?

[duerst]

In the recent Ruby committers' meeting, I heard somebody say that there was a claim that defining TAU might result in (slightly) better precision. Is this actually true? If yes, can this actually be achieved by just multiplying PI by 2?

[simonbaird]

The reasons for defining and using Tau have nothing to do with precision, so I think you're asking the wrong question here.