Re: [pygame] Pygame 1.8.1 blits under Windows slower than 1.8.0?

["René Dudfield" <renesd@xxxxxxxxx>]

hi,

What is that your refresh rate?  91fps is probably the refresh rate of
your monitor.
right click on monitor, select settings tab, select advanced button,
select Monitor tab in new window.


It's probably using the directx driver on your machine, and most
likely waiting for vsync.  Whereas 1.8.0 probably used the windib
driver on your machine.


I hope it's vsync anyway...

cheers,


On Wed, Aug 6, 2008 at 4:10 PM, Wojciech Stryjewski <thvortex@xxxxxxxxx> wrote:
> I wrote a little demo that blits a tiled scrolling background along
> with some sprites bouncing around. It also measures the time it takes
> to display each frame and displays the timing info in the window's
> title bar every second. When running with Python 2.5 and Pygame 1.8.0
> under Windows XP, my demo measures about 0.7ms to render a single
> frame in a 640x480 window using SWSURFACEs.
>
> However, after I installed Pygame 1.8.1 using the precompiled binary
> ("pygame-1.8.1.win32-py2.5.msi"), my demo now reports 7.37ms rendering
> time per frame. That's a 10x slow down.
>
> Can anyone confirm if this slow down is happening on other Windows
> machines (and other Pygame programs)? Or am I doing something really
> stupid in my code that causes this?
>
> You can download my little demo from:
> http://code.google.com/p/game-game/source/browse/#svn/trunk/experiments/pygame
>
> You'll need the following files:
> swsurface-linear.py
> tile.png
> ball.png
> palette.png
>
> When you run swsurface-linear.py, the window's title bar will look
> something like this:
> 640x480   Drawing: 7.37ms (67.6%)   Display: 91.7fps   Virtual:
> 20.0fps
>
> The "Drawing" is the average time per frame and the percentage is
> computed as actual rendering time over total available time per frame
> (about 10.9ms for 91.7fps).
>