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4.11 head, running on JDK 11 (if it matters). Just tried to open Type Hierarchy on IResource and it stays for a minute or so and uses lot of memory (jumps from 800 MB to 2 GB). Open Type Hierarchy on SortedSet (with way more children) takes a second, on Collection three seconds and uses ~300 MB. This can't be normal. I will try to profile this tomorrow, now it is a bit too late.
OK, just checked 4.9, 4.10 and 4.11 with new workspaces. Looks like we resolve IResource hierarchy instantly if I have not used "Add all plugins to Java search", and we need 12 seconds in 4.9/4.10 to resolve after that. Still, with 4.11 I20190201-1800 it needs 34 seconds, and because it does whatever it needs on UI thread, this is not acceptable. So we have a regression in 4.11 regarding the open type performance. I will report another bug for the blocking task.
OK, after some more experiments I've found that this is not a difference in the platform version, but a difference in the installed bundles that triples the time. I will check which bundles are causing this.
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant. -- The automated Eclipse Genie.
