In your case the map provider does not affects the performance of the information layer. Also I should note that we don't support projects which use Google provider, because it should use Google tiles directly. This conflicts with Google map license for using Google map data without the Google API.
I would suggest that you don't add a MapPinPoint on the map, because the pinpoints are invisible and also it is not good for performance. Also I would recommend that you upgrade the map control to new version as the information layer was redesigned and currently its performance is much better.
the Telerik team
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