A comparison between C++ and D

[Ola Fosheim Grøstad via Digitalmars-d]

On Wednesday, 9 March 2016 at 22:54:13 UTC, bigsandwich wrote:
> Yes, I do.  std::function<> uses type erasure to store a 
> "function".  If its small enough, its stored internally, 
> otherwise it goes on the heap.

Yes, I believe that is said to be the common implementation, but 
people also claim it comes with significant overhead. I haven't 
seen any numbers, have you seen any benchmarks on the difference 
between a templated "C++ functor" on a parameter and 
std::function<>?

> It uses RAII to manage the lifetime of the lambda.  D is using 
> the GC for managing the lifetime.  D doesn't have a way of 
> doing this without the GC.

I completely agree that D needs a lot of work to get the GC out 
of the way. I personally don't think std::function<> is doing the 
right thing.