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--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> wrote:
>
> Only on Windows 7 this system-wide GDI lock is removed and only
> there you could see graphic performance scaling
>
> Again, read the entire article:
>
http://blogs.msdn.com/e7/archive/2009/04/25/engineering-windows-7-for-gr\
aphics-performance.aspx
Very interesting info, IMO. Thanks for the reference Tomasz.
Will this be directly relevant to a future version of AB?
> Especially figure 4 GDI Concurrency and Scalability
> - as you can see in any pre-Win7 systems, GDI does not scale *at all*
> with adding threads.
>
> I can ensure you that I have actually *timed* many scenarios
> and what I say is based on actual measurement and not on somebody's
"belief".
> That was one of the reasons I did not use GDI+ ("improvement"
suggested by somebody on this list)
> because real-world test revealed that it is 6 times slower than normal
GDI.
> Microsoft admitted that by the way in their recent demonstration on
PDC (prof. dev. conference).
>
> So, all decisions regarding development of AmiBroker are not based on
beliefs but on
> hard code profiling evidence.
I love it!
It's great to have this level of detailed investigation behind the
platform. :^)
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