On Tuesday, 22 April 2014 at 18:48:04 UTC, Steven Schveighoffer
wrote:
I mean not like I can't because I don't want to or don't have
time, but can't as in I lack the skill set :) It's interesting
to debate, and I get the concepts, but I am not a CPU/cache
guy, and these things are really important to get right for
performance, since ref counting would be used frequently.
I think RC performance unfortunately is very hardware dependent.
So, it involves testing, benchmarking etc… Still, I think these
discussions are good because they are opportunities to look at
what others do (like Objective-C) which is educational (at least
for me).
The trouble I have with ref counting is that the future of HW is
uncertain, but that can be held against GC too. Take for instance
Phi with 80 cores and a crossbar interconnects (?), how does that
affect memory management? Unfortunately I have no personal
experience with Phi so my take on it is rather vague…
But if ARC takes a long time to get right I think one should
consider effects of upcoming HW when considering for/against.
Maybe Go's CSP model is better for Phi. Maybe not. I don't know,
but I think it is an interesting topic, because 4-8 cores is not
going to be enough in the next decade. I think…
