Can an internal implementation of a Custom View cause lag when used with RecyclerView?

Yes, the internal implementation of a Custom View can cause lag when used with RecyclerView, especially if heavy operations are performed in drawing methods (such as onDraw) or measurement methods (onMeasure).

The causes of lag can include:

• Complex calculations or object creation in onDraw/onMeasure.
• Frequent creation of new objects (e.g., Bitmap) instead of caching.
• Using heavy I/O operations or resource loading directly in drawing methods.

To avoid lag:

• Minimize work in onDraw and onMeasure, perform heavy operations in advance.
• Cache calculation results and objects.
• Use hardware acceleration and optimize drawing logic.

Thus, proper optimization of Custom View is critical for smooth RecyclerView performance.