<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="generator" content="Osso Notes">
<title></title></head>
<body>
<p>----- Original message -----
<br>> Hi,
<br>>
<br>> Am Samstag 12 Juni 2010 schrieb Ian Stirling:
<br>> > And speedups may be very possible - if for example you can offload
<br>> > portions of the workload onto a GPU.
<br>> That addresses the performance problem, but this likely also if you do
<br>> this
<br>> for performance reasons, it also increases battery consumption as you
<br>> put additional load onto another component of the SOC. But it may still
<br>> be
<br>> good to offload certain tasks from the main CPU to the GPU as the GPU
<br>> may do the same thing more power efficient.
<br>
<br>In most cases GPU will do same things more power efficient but it also offers better user experience doing things faster. Maybe best choice would be vectro based maps ang GPU going transformations and drawing.
<br>
<br>I don't know hat mappero (ex maemo mapper) does internaly but least, it can eat all cpu power when doing "processing maps" so that only way out is remove battery from device.
<br>
<br>> I really think low battery consumption is the most important issue with
<br>> a map widget as this type of widget is meant to be used over a longer
<br>> period of time and while being away from stationary power.
<br>
<br>I think that user experience is also most important thing. In many cases doing things fast makes good responsive user experience but also reduces battery consumption when application can be idle most of time.  Using GPU we can get good user experience and battery life same time. Qt3d is worh of checking for portable GPU library.
<br>
<br>Kate
<br>>
<br>> Till
<br>> _______________________________________________
<br>> maemo-developers mailing list
<br>> <a href="mailto:maemo-developers@maemo.org">maemo-developers@maemo.org</a>
<br>> <a href="https://lists.maemo.org/mailman/listinfo/maemo-developers">https://lists.maemo.org/mailman/listinfo/maemo-developers</a>
<br>>
<br><br></p>
</body>
</html>