That not the point, though. The point is that the cost is invisible with exceptions. For example, there could perhaps be an alternate version of C++ where every

That not the point, though. The point is that the cost is invisible with exceptions. For example, there could perhaps be an alternate version of C++ where every function is required to declare whether it could throw an exception (and a very smart compiler proves where it's possible), or that -fno-except flag is inverted so you have to opt in to exceptions.