The GC and performance, but not what you expect
Shammah Chancellor via Digitalmars-d
digitalmars-d at puremagic.com
Thu May 29 05:18:52 PDT 2014
On 2014-05-29 11:03:11 +0000, Wanderer said:
> It will be hard to beat Java's garbage collector. They use
> generational, sequential memory approach, while D's memory manager
> (correct me if I'm wrong) uses more common approach and has to deal
> with possible memory fragmentation. Allocating a new object is
> extremely cheap in Java, literally a few machine instructions, and
> there is no locking because each thread has its own eden memory and
> they never overlap.
>
> Unless D introduces the possibility to move objects around in heap
> (which is not possible with the support of pointers, I guess) and
> eliminate the fragmentation, it will be hard to make GC as fast. Just
> 3% of difference look great enough to me. :-)
I was under the impression that the D gc does move objects around on
the heap and then update the pointers.
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