[maximilianburke]

> I'd wager that for the majority of programs written, the fast math is as good as the accurate math.

I'd take that wager. I spent 13 years working on video games and video game technology, a domain where floating point performance is critical, and by and large we never used fast-math because of the problems it created for us.

[gautamcgoel]

This is surprising to me! Can you explain what problems you encountered? My (limited) understanding is that the main effect of fast-math is to turn off support for subnormals. Since subnormals are only used to represent extremely small values, I wouldn't expect them to have much effect in the real world.

[subharmonicon]

fast-math can result in many things you may not expect, e.g. treating FP operations as being associative and distributive, which they aren’t.

[Dylan16807]

Sure but when does that matter in video game math?

[BeetleB]

Happy to take that wager, because the majority of programs written are not video games related :-)

[alehlopeh]

I’m more curious about how it caused problems for you if you ever used it