Why Is D So Slow?

[Kaleb McKinney]

On Friday, 25 May 2018 at 00:40:55 UTC, bachmeier wrote:
> On Friday, 25 May 2018 at 00:35:43 UTC, Kaleb McKinney wrote:
>> I began learning D to get a performance upgrade from Python 
>> for performance reliant applications, and I was disappointed 
>> to find that a basic "Hello, World!" program takes almost 8 
>> seconds to run, where in Python, it only took about a tenth of 
>> a second. Why is it so slow?
>
> If you're on Windows, it's probably an antivirus issue.

What would the antivirus be doing to slow it down?