On Mon, 03 Feb 2014 23:05:35 -0800, Eric Suen <eric.suen.t...@gmail.com>
wrote:
"Ola Fosheim Gr?stad" <ola.fosheim.grostad+dl...@gmail.com>"> On
Tuesday, 4 February 2014 at 00:49:04 UTC, Adam Wilson
wrote:
Ahem. Wrong. See: WinForms, WPF, Silverlight. All extremely successful
GUI toolkits that are not known for GC related
problems. I've been working with WPF since 2005, I can say the biggest
performance problem with it by far is the
naive rendering of rounded corners, the GC has NEVER caused a hitch.
According to Wikipedia:
?While the majority of WPF is in managed code, the composition engine
which renders the WPF applications is a native
component. It is named Media Integration Layer (MIL) and resides in
milcore.dll. It interfaces directly with DirectX
and provides basic support for 2D and 3D surfaces, timer-controlled
manipulation of contents of a surface with a view
to exposing animation constructs at a higher level, and compositing the
individual elements of a WPF application into
a final 3D "scene" that represents the UI of the application and
renders it to the screen.?
So, Microsoft does not think that GC is suitable for real time
interactive graphics. And they are right.
As long as other code is in managed code, there is GC running at
background, no matter your code write in whatever high performance
language, it will be affect by GC anyway. so that "So, Microsoft does
not think that GC is suitable for real time > interactive graphics.
And they are right." is only your opinion. you don't know the real reason
behind MS's decision. some resource need release ASAP, so you can't
rely on GC. or maybe bacause of overhead when call low API in managed
code.
Actually the reason is that DirectX is a specialized Native COM-Like API
that is NOT compatible with normal COM and therefore not compatible with
.NET COM Interop. Milcore is a low-level immediate API. Most of the
legwork in WPF is done in managed code. And yes, the GC would effect the
performance regardless of whether or not the rendering API is native
because so much of WPF is managed code.
--
Adam Wilson
GitHub/IRC: LightBender
Aurora Project Coordinator
