Managing Large Single-Mesh Terrain Textures Efficiently in Three.js

What are the best ways to texture a large terrain object composed of a single mesh? (e.g., a large island terrain object)

hi im 3d generalist in South Korea

Is there an effective method to manage textures for a large single object without using the UDIM texture feature?

I am concerned about potential performance issues when using UDIM with multiple textures in an online Three.js environment. Will using many textures in this way negatively affect performance?