let sec_counter = 0
let min_counter = 0
let hour_counter = 0

const ms = ref(0)
const sec = computed(() => { sec_counter++; return Math.floor(ms.value / 1000) })
const min = computed(() => { min_counter++; return Math.floor(sec.value / 60) })
const hour = computed(() => { hour_counter++; return Math.floor(min.value / 60) })

for (ms.value = 0;  ms.value < 10000000; ms.value += 100) {
  hour.value
}

console.log(`sec: ${sec.value}, sec_counter: ${sec_counter}`) // sec: 10000, sec_counter: 100001
console.log(`min: ${min.value}, min_counter: ${min_counter}`) // min: 166, min_counter: 100001
console.log(`hour: ${hour.value}, hour_counter: ${hour_counter}`) // hour: 2, hour_counter: 100001

let sec_counter = 0
let min_counter = 0
let hour_counter = 0

const ms = ref(0)
const sec = computed(() => { sec_counter++; return Math.floor(ms.value / 1000) })
const min = computed(() => { min_counter++; return Math.floor(sec.value / 60) })
const hour = computed(() => { hour_counter++; return Math.floor(min.value / 60) })

for (ms.value = 0;  ms.value < 10000000; ms.value += 100) {
  hour.value
}

console.log(`sec: ${sec.value}, sec_counter: ${sec_counter}`) // sec: 10000, sec_counter: 100001
console.log(`min: ${min.value}, min_counter: ${min_counter}`) // min: 166, min_counter: 10001
console.log(`hour: ${hour.value}, hour_counter: ${hour_counter}`) // hour: 2, hour_counter: 167