Storage of tile

Generally, the local storage mode of tile is level\x_ coord\y.png.But,As the number of tiles increases, cesium loads tiles more slowly.Is there any good way to solve this problem?(such as, modify the folder structure,like level\x_coord%1024\x_coord\y_coord%1024\y_coord.png).

I’m not quite sure what you’re asking. Since you’ve mentioned PNG files, is this a question about some kind of raster overlay?