D perfomance

[serge]

D has sparked my interested therefore last week I have started to 
look into the language and have completed D course on 
pluralsight. One of area where I would like to apply D in  web 
application/cloud. Golang  is not bad but I think D seems more 
powerful. Although during my research I have found interesting 
facts:

1) fib test (https://github.com/drujensen/fib) with D  (compiled 
with ldc) showed really good performance results.
2) Various Web performance test on  
https://www.techempower.com/benchmarks/#section=data-r18&hw=ph&test=query show pretty poor performance of D using vibe.d and hunt framework/libraries.  Regardless of type of test - json, single query, multiple query and so on.

My understanding that D is the language in similar ballpark 
performance league as C, C++, Rust. Hence the question - why web 
performance of those 2 web frameworks is so poor compared to 
rivals? I would say few times worse. This is not a troll post by 
any means. I am researching if D and D web framework whether it 
can be used as  replacement python/django/flask within our 
company. Although if D web framework show worse performance than 
Go then probably it is not right tool for the job.
Any comments and feedback would be appreciated.