Creating and closing figure takes a really long time

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Daniel Ko 2020-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/675633-creating-and-closing-figure-takes-a-really-long-time

评论： Daniel Ko 2020-12-8

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Hello

I have a simple class which creates an uifigure with a grid, a couple of panels and multiple axes:

classdef multiChanFig < handle
    properties
        f
        panelU
        axesU = gobjects(2,0);
        panelT
        axesT = gobjects(0);
        shownCh = [];
        titles = [];
    end
    
    methods
        function obj = multiChanFig(shownCh)
            obj.f = uifigure('Position',[50,50,1800,900]);
            g = uigridlayout(obj.f);
            g.RowHeight = repmat({'1x'},[1,2+length(shownCh)]);
            g.ColumnWidth = repmat({'1x'},[1,length(shownCh)]);
            g.ColumnSpacing = 0;
            g.RowSpacing = 0;
            g.Padding = [0 0 0 0];
            
            
            for ii = 1:length(shownCh)
                for jj = 1:2
                    np = uipanel(g);
                    np.BorderType = 'none';
                    np.Layout.Row = jj;
                    np.Layout.Column = ii;
                    obj.panelU(jj,ii) = np;
                    obj.axesU(jj,ii) = axes('Parent',obj.panelU(jj,ii));
                end
                np = uipanel(g);
                np.BorderType = 'none';
                np.Layout.Row = 2+ii;
                if length(shownCh) == 1
                    np.Layout.Column = 1;
                else
                    np.Layout.Column = [1, length(shownCh)];
                end
                obj.panelT(ii) = np;
                obj.axesT = axes('Parent',obj.panelT(ii));
            end
        end
    end
end

I am calling it from command line using:

o = multiChanFig([1,2,3])

It takes so long to "create" (the actual popup is pretty quick but then the axes limits/ticks auto-adjusting to the size of the window takes a looong time) and when I click on the X to exit the figure it takes 20+ seconds are you can see from this profiler:

Vast majority of the slowdown comes from Matlab figure processes it seems, with the biggest offenders being ControlManager.sendControlManagerMessage and InteractionsManager.sendInteractionsManagerMessage. These are both P-files so I cannot even see why it takes so long to do such simple operations.

Has anyone else encountered this? Any advice? Thanks