No there isn't. Every time the panel needs to be painted, it will be painted. That is with each call to repaint() (which you may be able to control in your own code), but also whenever a component is added to the panel, the panel is made visible, the panel is resized, or even the window with the panel becomes the active window while the panel is shown.
Instead of asking how you can reduce the number of calls to this method,
you should instead investigate what is making the repainting so slow? I've created a panel that, along with dozens of labels, can draw connectors between them, including arrow points that require multiple sine and cosine calculations. In the user interface itself you hardly know that anything is happening.