Why is D Slow?

[Dlang Lover]

I've been reviewing most Benchmark tests lately. However, system 
programming languages ​​such as Rust and C++ promise high speed 
in almost every field. But I can't see that for D language. For 
example, does it make sense for a Web Framework to have such a 
speed issue between Rust and D? Why is there such a speed 
difference?

https://web-frameworks-benchmark.netlify.app/compare?f=vibed,axum

Again, when I examine a few tests outside of the Web domain, for 
example, in the Github repository below, D language comes after 
C++ and Rust most of the time, but here too, DMD is slow next to 
LDC and GDC.

https://github.com/kostya/benchmarks

What's behind the speed problem of the D language? What can be 
done for this? Although I do not know much about compiler and 
language development, if there is a solution to such problems? I 
want to support as much as I can.