Snippet to measure operation per second

operationPerSecond.js

function operationPerSecond () {
  let lastNotifyTime = Date.now()
  let operationCount = 0
  return () => {
    operationCount++
    if (Date.now() - lastNotifyTime > 1000) {
      console.log('opp per sec:', operationCount)
      operationCount = 0
      lastNotifyTime = Date.now()
    }
  }
}

const tick = operationPerSecond()

function varyFrequentlyOpperation () {
  // some code
  tick()
}