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1) Performance tests: Compare old and new implementation of PerimeterLayout (newer version uses new layout), should be at least on the same level; measure scalability - adding/removing of several tens of Top Components; measure time needed to draw such complicated layouts 2) functional tests: correct adding/removing, correct constraints kept
Target milestone was changed from '3.4' to TBD.
See issue #20223
Because Window System v1 will not be supported from now by our team, all old winsys issues (now "core/window system v1" issues) are going to be closed as WONTFIX. Changes in API which emerged both from UI spec and problems with adjusting to the older API are described in the document http://core.netbeans.org/windowsystem/changes.html. It shows also recommends how the client code should be adjusted to the new window system. If you think this issue apply also to the new winsys then change the subcomponent (to "core/window system") and REOPEN it.
issue doesn't apply to new window system - verified