On 05-09-2012 13:03, Benjamin Thaut wrote:
I rewrote a 3d game I created during my studies with D 2.0 to manual
memory mangement. If I'm not studying I'm working in the 3d Engine
deparement of Havok. As I needed to pratice manual memory management and
did want to get rid of the GC in D for quite some time, I did go through
all this effort to create a GC free version of my game.
The results are:
DMD GC Version: 71 FPS, 14.0 ms frametime
GDC GC Version: 128.6 FPS, 7.72 ms frametime
DMD MMM Version: 142.8 FPS, 7.02 ms frametime
GC collection times:
DMD GC Version: 8.9 ms
GDC GC Version: 4.1 ms
As you see the manual managed version is twice as fast as the garbage
collected one. Even the highly optimized version created with GDC is
still slower the the manual memory management.
You can find the full article at:
http://3d.benjamin-thaut.de/?p=20#more-20
Feedback is welcome.
Kind Regards
Benjamin Thaut
Is source code available anywhere?
Also, I have to point out that programming for a garbage collected
runtime is very different from doing manual memory management. The same
patterns don't apply, and you optimize in different ways. For instance,
when using a GC, it is very recommendable that you allocate up front and
use object pooling - and most importantly, don't allocate at all during
your render loop.
--
Alex Rønne Petersen
a...@lycus.org
http://lycus.org
