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SfRating performance: multiple 10 star controls in a SfListView

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132864 Sep 26,2017 03:14 AM UTC Sep 29,2017 12:49 PM UTC Xamarin.Forms 1
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Tags: SfRating
Jared Thirsk
Asked On September 26, 2017 03:14 AM UTC

Hi,

I am having severe performance problems on a BlackBerry Q10 (it's unusable) and significant problems on Xperia E1 when I put a list of SfRating controls with 10 stars in it, and then try to scroll in a SfListView (and instead of SfListView I also tried a Repeater control I found on the internet which is like WPF's ItemsControl).

It is fine on some newer devices.

Does anyone know why this might be so slow?  Is it overloading older and more limited GPUs with too many sprites? (Seems unlikely).  Is it trying to construct stars on the fly using some sort of inefficient vector drawing and color filling approach, or does it just use images?

For now, I have had to create my own control and just put android buttons inside, and it doesn't look as nice, but it is extremely smooth.

Any tips or feedback?

(I was looking for a way to turn caching on/off in SfListView, like I believe you can in ListView but couldn't see it.)

Thanks
-Jared

Rajkumar Ganesamoorthy [Syncfusion]
Replied On September 29, 2017 12:49 PM UTC

Hi Jared,

Thanks for your update.

We could reproduce the reported issue "Performance issue with SfRating" from our side. A support incident to track the status of this defect has been created under your account. Please log on to our support website to check for further updates.

https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents/ 

Regards,
Rajkumar G. 


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