import typia from 'typia'

type User = {
  name: string
  age: number
  address: {
    room?: number
    city: string
    street: string
  }
}

const ivan: User = {
  name: 'ivan',
  age: 19,
  address: {
    street: 'Ivanovskaya',
    city: 'Berlin'
  }
}

let cache: User | null = null

function heavyFunction(user: User) {
  if (t.compare<User>(user, cache)) {
    return 'cached'
  }
  // heavy operation
  cache = user
  return 'non-cached'
}

heavyFunction(ivan) // -> 'non-cached'
heavyFunction(ivan) // -> 'cached'

if (
 user === cache || (
   user.name === cache.name &&
   user.age === cache.age &&
  (user.address === cache.address || 
      (user.address.room === cache.address.room && user.address.city === cache.address.city && user.address.street === cache.address.street)
  )
)) {
  return 'cached'
}