nano-performance/src/index.ts

An extremely lightweight node module that measures execution time in nanoseconds

import { performance, PerformanceObserver } from 'perf_hooks'

const timing = {}

const timeStart = (key) => {
  if (!key) return null
  timing[key] = performance.now()
  return true
}

const timeEnd = (key, format = 'ms') => {
  if (!key) return null

  const start = timing[key]
  if (!start) return null

  let formatValue = 1000

  switch (format.toLowerCase()) {
    case 'ns':
      formatValue = 1
      break
  }

  const end = performance.now()
  const result = (end - start) / formatValue

  console.log(`${key}: ${result} ${format}`)
  delete timing[key]

  return true
}

export default {
  timeStart,
  timeEnd
}