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Created attachment 272288 [details] session 1 Million project Steps to reproduce: * import the attached project * measure the time to open it -> KO. the time to open the session is about 300s whereas the expected time is about 67s time is spent in DViewQuery.getLoadedRepresentations which calls org.eclipse.sirius.business.internal.representation.DRepresentationDescriptorToDRepresentationLinkManager.getRepresentationInternal(boolean) The issue comes from the fact that * It iterates on the direct content of the aird resource and there are 10700 representations * It is called a huge number of times due to the participant to execute Once loaded, and saved (do any little change), the loading time is the expected 67s.
I am not convinced that fixing that bug has a great interest for the following reasons: - it occurs during the migration and will not occur the following open if it has been saved - we have rarely as many representations in the aird - the fix would need some cache of loaded representation that would need to be updated. It does not in the direction of more robustness
Available in Sirius 6.0.0, see https://wiki.eclipse.org/Sirius/6.0.0 for details
