dmd 1.063 and 2.048 release

[Jordi]

On 08/15/2010 01:50 PM, dsimcha wrote:
> == Quote from Jordi (jordi at rovira.cat)'s article
>> On 08/11/2010 04:15 PM, Walter Bright wrote:
>>>
>>> This is probably the last FreeBSD 7 release for D1. The next will be for
>>> FreeBSD 8!
>>>
>>> http://www.digitalmars.com/d/1.0/changelog.html
>>> http://ftp.digitalmars.com/dmd.1.063.zip
>>>
>>> http://www.digitalmars.com/d/2.0/changelog.html
>>> http://ftp.digitalmars.com/dmd.2.048.zip
>> Hi,
>>     Congratulations for this release! This time it really made a
>> difference when i switched from 2.0.46. The framerate of my app used to
>> degenerate with time very quickly and now it remains fast and stable!
>>     Maybe some of the many fixes helped the garbage collector?
>>     Congratulations again.
>> j.
>
> Probably the GC.minimize() patch.  Previously the GC would **never** give memory
> back to the OS.  In addition to the obvious reason, this is bad because the GC is
> currently not well optimized and slows down a lot when the heap gets large, even
> if most of it doesn't contain pointers and isn't scanned.

Great. I always thought i was missing some important point about garbage 
collection, and i was doing everything wrong. I am used to manage my own 
memory in C++...

Anyway, i had to roll back to 2.0.46 as i have seen that from 2.0.47 
some behaviour has changed in my program. I cannot really make a small 
reproduction case, because it involves dragging objects around the 3d 
scene: since 2.0.47 they follow weird curved paths instead of moving 
correctly on the camera plane.

The code that calculate that (which is not new) just uses matrix and 
vector operations to project and unproject positions, but i cannot 
really find where do the numbers start to go wrong.

j.