Performance issues with RDraw about rlayers HOT 4 CLOSED

Alas, this is a very error-prone optimization and the difference is barely noticeable - it comes mostly because Chrome emits a warning. I prefer to not do this especially since it will be valid only when the interaction is empty - once you add any processing to this interaction, the performance is the same as raw Openlayers.

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@PaliMartin Which version of Openlayers are you using? 7.3.0 has a number of improvements - including suppression of the Chrome warning - and it is marginally faster.

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If you don't use pointer move events in your application, you can somewhere in the initialisation before the map is created (it is fine in the global context):

RFeature.pointerEvents = ['click'];

This will increase performance if you have a layer with lots of features.

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Addressed in #165

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