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Comment by maxpert | Hacker News Reader

Makes me wonder, how many people actually use D-lang in production. Specifically with HTTP stack what kind of numbers/performance benchmarks we are looking at? Other than toy projects is there a company out there running D on massive scale (millions per day)?

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They have a page here: http://dlang.org/orgs-using-d.html

Based on that I would look at Funatics since they seem to have the "bigger" traffic, or even AdRoll...

http://tech.adroll.com/blog/data/2014/11/17/d-is-for-data-sc...

Edit:

To be fair a lot of the companies there look like they handle heavier loads. Also Garbage Collection is optional, and there are alternatives to the "standard library" for D that others have made that are probably usable without GC. Some people have done successful embedded systems programming without the GC, I remember one guy talking about it on the D irc channel.

Netflix and Machine Learning with D.

There was a similar comment : https://news.ycombinator.com/item?id=14064012 who also seems to work on Machine Learning with D at Netflix. It will be a great help if you can add it to https://dlang.org/orgs-using-d.html or share the experience and scale at which its being used at Netflix if its not a problem . Thanks .

D would make a good case study to look at why some technologies find widespread use whereas others don't. I don't understand why it never took over from C++.

D's standard library uses garbage collection.

So do Java, C#, Python, Ruby, PHP, Javascript, and virtually everything else and they are very heavily used. Garbage collection is a smashing success in the real world and D made the right decision to follow that success.

Of course, it is also true that much of the standard library doesn't actually use it... but these objections are never actually about facts.

None of those languages you listed are for systems programming, which is the one niche you need to excel at if you want to replace C and C++. People who care about that stuff tend to care a lot about managing memory.

Ds GC can be turned off to do systems programming.

How much of the standard library can you use in that mode?

> So do Java, C#, Python, Ruby, PHP, Javascript, and virtually everything else and they are very heavily used.

That's the point. There are already many popular languages with GC. Why would people switch from C++ (this was the original question) to D instead of one of those much more popular languages that you mentioned?

C++ was deliberately backwards compatible with C. D was not backwards compatible with C or C++.

D uses C calling conventions and struct layout so it's pretty trivial to call D code from D or vicecersa and link together, the only step added over C++ is writing an include file with the declarations of the stuff you want to call.

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