Is D slow?

[Honey via Digitalmars-d-learn]

On Saturday, 10 June 2017 at 11:53:44 UTC, Johan Engelen wrote:
>> `-release` should be synonymous with `-release 
>> -boundscheck=off`.
>
> Nope it's not.
> http://www.digitalmars.com/d/archives/digitalmars/D/What_s_the_deal_with_-boundscheck_260237.html

Thank you for clarifying that point. Is it expected that turning 
off bounds checking can lead to a performance decrease?