[516493] Improve efficiency of NotifyingXMLHelper.setValue

Almost 25 % of the loading time is spent in
NotifyingParserPool.NotifyingXMLHelper.setValue, so it should be as
efficient as possible. Therefore, we should avoid all proxy checking
stuff if the feature isn't an EReference.

Bug: 516493
Change-Id: I58e277d6463d57345a31bb0fbebadb7d7d61948f
Signed-off-by: Philip Langer <planger@eclipsesource.com>
1 file changed