Rendering ya Flutter huhusisha miti mitatu — Widget tree (configuration), Element tree (widgets zilizotengenezwa na kusimamiwa), na RenderObject tree (layout na painting). Kuelewa pipeline hii hufafanua jinsi Flutter inavyobadilisha widgets kuwa pikseli kwa ufanisi.
Miti mitatu
WIDGET tree → immutable CONFIGURATION (what you write: the description of the UI)
→ cheap to create/recreate; rebuilt often (build() returns new widgets)
ELEMENT tree → the INSTANTIATED widgets; manages lifecycle and LINKS widgets to render
objects; PERSISTS across rebuilds (this is the key to efficiency)
RENDEROBJECT tree → does the actual LAYOUT, PAINTING, and hit-testing (the heavy objects)
→ expensive; REUSED and updated (not recreated) across rebuilds
