DIP60: @nogc attribute

[via Digitalmars-d]

Here are two very good reasons to avoid extensive ref-counting:

1. transactional memory ( you don't want a lock on two reads )

2. cache coherency ( you don't want barriers everywhere )

Betting everything on ref counting is the same as saying no to 
upcoming CPUs.

IMO that means ARC is DOA. It might be useful for some high level 
objects… but I don't understand why one would think that it is a 
good low level solution. It is a single-threaded solution.