If you need a line or "separator" between your items, don't manually add a border to your list items. Use ListView.separated instead. It works exactly like the builder but adds a separatorBuilder property. Common Pitfalls
It reduces the initial load time and keeps the scrolling frame rate smooth. listview builder in flutter
The ListView.builder is a factory constructor that creates a scrollable, linear array of widgets that are . If you need a line or "separator" between
Unlike the default ListView constructor, which requires you to pass a static list of children all at once, the builder only initializes the items that are actually visible on the screen (plus a small cache margin). This concept is known as or windowing . Why use the Builder pattern? Common Pitfalls It reduces the initial load time
This tells Flutter how many items are in your list. If you omit this, the list will be infinite. 2. itemBuilder