On Sunday, 15 October 2017 at 12:14:02 UTC, Dmitry Olshansky
wrote:
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.
Ok. Still not convinced to use D instead of C++ for my personal
use cases (games and other soft real-time apps), but I get the
idea.
Can you just confirm that D's fibers use most of the available
processors/cores by default ?
I think this is quite automatic with Elixir's Phoenix framework.
http://phoenixframework.org/blog/the-road-to-2-million-websocket-connections
(one more silly benchmark btw, they just open the connections
without doing anything useful with them)
Btw, when I say you can actually develop complete web servers in
Dart and Go just with the components provided in the standard
libraries, I really mean it, even if I personally also use higher
level external libraries/frameworks (from Github), which extend
the lower level components of Go's standard library.
