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Refresh time with many layers

#1

Hi,

In order to support the visibility property of individual shapes, I am currently forced to place each shape into it’s own Layer which I think has a serious impact on speed of refresh for the layer.

Attached a quick project to show what I mean. Just click build lines and observe the refresh times. Can you please take a look and advice on how best to improve the draw times?

RefreshBenchmark.zip (43.2 KB)

Regards,
Damian

#2

Hi Damian,

For your scenario, I hadn’t found a solution to improve the performance.

I tried some ways like this:

imfl.Open();

imfl.BuildIndex();

winformsMap1.DrawingQuality = DrawingQuality.HighSpeed;

And comment the projection, but it still don’t works.

I don’t know whether you can use cache, if you cannot use it, reduce the layer number is only solution.

Regards,

Ethan