Composition API: One significant change in Vue 3 is the introduction of the Composition API, which provides a more flexible and modular approach to component creation. It allows developers to organize code logic based on functionality rather than the lifecycle hooks used in Vue 2-
vue2 vs vue3
Performance and Size: Vue 3 introduces a new rendering engine called "Vue 3 Reactivity," which provides better performance than Vue 2. This is achieved by optimizing the reactivity system and reducing the size of the framework, resulting in faster rendering and smaller package sizes.