D vs C++ - Where are the benchmarks?
Jonathan M Davis
jmdavisProg at gmx.com
Sun Jun 30 16:06:22 PDT 2013
On Monday, July 01, 2013 00:35:45 David wrote:
> Am 30.06.2013 22:53, schrieb SomeDude:
> > On Sunday, 30 June 2013 at 20:47:17 UTC, Adam D. Ruppe wrote:
> >> On Sunday, 30 June 2013 at 20:37:16 UTC, SomeDude wrote:
> >>> It seems indeed that the automatic memory management is a major
> >>> performance killer
> >>
> >> Eh, I'd say it is D's gc implementation specifically that is the
> >> biggest worry rather than the concept. I think the .net gc is
> >> seriously like 10x faster than D's implementation.
> >
> > Yes, yes, you're right. However, not allocating at least in Phobos is
> > one of the surest way to get near optimal performance, not to mention
> > it's always more satisfying when you know that your program doesn't
> > monopolize Mb of RAM to do even the simplest task.
>
> Wow, I don't care if it does, especially if it is only a simple task.
> Memory is there to be used. If I want to avoid memory useage, I wouldn't
> be using D.
For simple stuff, I really don't care much about how much memory a program uses
as long as it's not an outrageous amount. So personally, I don't find it more
satisfying to know that my program doesn't monopolize MB of RAM. And honestly,
I have enough RAM on my system, that you _can't_ monopolize RAM if you're not
talking in GB. However, memory usage matters a _lot_ for programs that need to
be really performant (especially when they're larger programs), and having the
GC kick in a lot due to how much memory you're using can be a real performance
killer. So, being able to minimize the memory footprint of your program is
critical, because there are cases where you _really_ care, but there are also
plenty of cases where you really don't.
- Jonathan M Davis
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