D on quora ...

[Dmitry Olshansky]

On Sunday, 15 October 2017 at 10:09:02 UTC, Ecstatic Coder wrote:
>> If the GC issue can not be tackled and even with the recent 
>> communication blogs, it still keeps showing up. Is it maybe 
>> not better to focus the marketing features that other 
>> developers ( none C++ ) may see as advantages and slow draw 
>> then in? High performance web development package for 
>> instance. Vibe.d does not count because has not been seen 
>> giving any descent public performance in years ( like 
>> techempower or other sites ).
>
> At the moment, for very demanding high-performance web 
> applications, the main choices are :
> - Dart
> - Go
> - C/C++
> - Java/Kotlin
>
> This is somewhat confirmed by the following benchmark (despite 
> its well known flaws) :
>
> https://www.techempower.com/benchmarks/#section=data-r14&hw=ph&test=query
>
> I think that D, with its fiber system and extreme execution 
> speeds, should already have everything needed to compete on the 
> same grounds as Dart and Go.
>
> But only if :
> - the fibers automatically uses all cores if allowed to do so;

Even if a given fiber is pinned to particular core it will be 
balanced with typical http request/response model where you have 
LOTs of short-lived requests. So no changes required.

> - the GC problems is designed so that the server never hangs 
> for more than a few milliseconds IN THE WORST CASE (progressive 
> GC)

Actually prioritizing low latency will hurt RPS you seem to care 
about. Java can easily stay in top 20 with pauses of up to ~100ms.

> - dedicated HIGH PERFORMANCE web server (cfr Go/Dart) and

Might work. In this benchmark it’s hardly the bottleneck, the 
hardware used can crank out millions of HTTP responses per second.

> database access (MySQL, PostgreSQL, Aerospike) libraries are 
> available,

That is important actually.

> preferably as a standard library (like in Dart and Go).

Can’t do that. And it’s not standard in Go and Dart but packages, 
dub should work for that.

>
> And for the third point, I really mean high performance, 
> something that make D's implementation of the (silly) 
> benchmarks immediately go to the top of the chart.
>

Well I kind if doing this for Regex at times.
Ilia did this with BLAS libraries. If we had a dozen more of 
performance maniacs with plenty of spare time we’d win every 
silly benchmark.

> If all that is already available, perfect :)
[snip]
> And moreover I'd be delighted to start using D instead of Go 
> for my next web server developments.

You can start now and get performance later? In fact you may 
supply important benchmarks from your day to day usage.