I work on a product written in Go which is considerably smaller than 25 million lines and our compile times are... really... really long. I really don't believe that claim at all.
If it's true, I would love to see how it's done because that is SOOO far away from my daily experience.
I was skeptical as well. Thanks for providing feedback. I suspect the way they were counting lines was wrong as 25M lines is a very large project in its own right.