What problem does this feature solve?

I have a setting using computed to implement dynamic structure. But type words always recalculate computed result too quickly. Also, I need debouce some times to improve performance, when using computed on somewhere user input.

What does the proposed API look like?

const formSetting = computed({ get:()=>{ return {sth...} }, debounce:1000 })

Use refDebounced from VueUse instead. Doc: https://vueuse.org/shared/refDebounced/

I think it's not a core feature of reactivity, so we should not expect it's implemented by Vue core but by Vue's ecosystem projects.