There does not seem to be a performance hit,
although if you do not remember to add event.Skip(),
then things could get a bit odd. (Of course, that is always the case).
The only plugin that used the old version (that I wrote) is SimpleDebugger, which I will be retiring soon anyway.
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For the next version,
instead of using
DrFrame.AddPluginOnNewFunction('PluginName', func)
you can just use:
DrFrame.Bind(DrFrame.EVT_DRPY_NEW, func)
There does not seem to be a performance hit,
although if you do not remember to add event.Skip(),
then things could get a bit odd. (Of course, that is always the case).
The only plugin that used the old version (that I wrote) is SimpleDebugger, which I will be retiring soon anyway.