The GC and performance, but not what you expect

[Shammah Chancellor via Digitalmars-d]

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.