Remember that Go vs D MQTT thing and how we wondered about dmd vs gdc?

[Bienlein]

On Friday, 7 March 2014 at 18:56:05 UTC, Andrei Alexandrescu 
wrote:
> On 3/7/14, 12:45 AM, Bienlein wrote:
>> If you want to give D a boost, put Go-style CSP and green 
>> threads into
>> it as well. Then D will start to fly. Otherwise it will have 
>> to continue
>> competing against C++ as its sole application area where it 
>> will always
>> remain a niche player, because of the market dominance of C++.
>
> Interesting you should mention that. Walter has been mulling 
> over a possible DIP on that.

Would be awesome if D got some kind of CSP. I used to reproduce 
deadlocks and race conditions for some years in a shop floor 
manufacturing system and fix them. From that experience I can say 
that you really run into much less trouble whith channels as in 
Go compared to using locks, sempahores, etc. You can even 
gradually improve your concurrent solution as you can stick to 
channels to which your threads are bound to. Without them threads 
go through everything where locks don't help with the structuring 
but only increase complexity.

If you realize there is some mutex missing, it can be very hard 
to move it in place and only have little code in the mutex block. 
Changing concurrent code based on locks is very deadlock 
critical. So being defensive you put the mutex block around a lot 
of code rather than refactoring it to get the mutex block small 
to have little lock contention. With CSP you only have to fix the 
way you deal with some channel or introduce some other channel. 
CSP is truly a step ahead IMHO.

-- Bienlein