How does garbage collection work in Dart and how does it affect Flutter?

Dart uses a generational garbage collector with two phases: Young Space (Scavenger) and Old Space (Mark-Sweep).

Most Flutter widgets are short-lived (destroyed every frame). The Young Space GC is optimized to quickly clean up these ephemeral objects without pausing the main thread, resulting in zero jank. Objects that survive multiple young GC cycles are promoted to Old Space, which is collected during idle times.