nothrow by default

[Gregor Mückl]

On Friday, 10 January 2020 at 01:40:00 UTC, Walter Bright wrote:
> On 1/9/2020 12:39 PM, H. S. Teoh wrote:
>> It's not really the exceptions themselves
>> that people object to, but the associated implementation 
>> issues.
>
> Yes. They're very costly, even in code that never throws.
>

The longer this discussion drags on, the more I doubt my 
understanding of this topic.

What exactly is the execution overhead for non-throwing code 
paths?

I believe I understand the overhead once stack unwinding needs to 
be performed, but how is code generation affected for the normal 
path?