How to improve the redraw speed?

The refresh frequency of the screen is 60Hz, and the refresh frequency of the map is 30Hz, so the operation of the map is relatively slow. I use local SQLite map data, when the map window is small, the redraw time is 0.015s, and when the window is large, the redraw time is 0.046s

Hello @zcwbnu

I’m not sure what makes you say that the map refresh rate is 30Hz. There’s no such ‘clocking’ of the redraw. I would first refer to this answer and see if it helps.