Create scripts/core

scripts/core/timer.js

@@ -0,0 +1,29 @@
+const { performance } = require('perf_hooks')
+const dayjs = require('dayjs')
+const duration = require('dayjs/plugin/duration')
+const relativeTime = require('dayjs/plugin/relativeTime')
+
+dayjs.extend(relativeTime)
+dayjs.extend(duration)
+
+const timer = {}
+
+let t0 = 0
+
+timer.start = function () {
+  t0 = performance.now()
+}
+
+timer.format = function (f) {
+  let t1 = performance.now()
+
+  return dayjs.duration(t1 - t0).format(f)
+}
+
+timer.humanize = function (suffix = true) {
+  let t1 = performance.now()
+
+  return dayjs.duration(t1 - t0).humanize(suffix)
+}
+
+module.exports = timer