Does D use zero-cost exceptions?

[Araq]

On Monday, 15 April 2019 at 20:24:27 UTC, Andrei Alexandrescu 
wrote:

>
> Sadly that's not quite the case... we've run a bunch of test at 
> Facebook back in the day and the sheer presence of unwinding 
> disables a bunch of optimizations, notably code motion and 
> everything enabled by it. The bottom line effect is quite 
> unpleasant, in the single digits.
>
> This is a problem important enough for C++ that they added a 
> keyword dedicated to it (noexcept).

Did you compare it to if-based error handling or to calling 
terminate/abort on error? I would expect that excessive if 
statements for error handling prevent the code motion 
optimizations in the same way.