k = function()

in static/js/tracker.js [2574:2603]


        k = function (e, n, t) {
          if (void 0 === e)
            return console.error(
              "Failed to execute 'measure' on 'Performance': at least 1 argument required, but only 0 present."
            );
          var r = void 0 === n ? null : b(n),
            o = void 0 === t ? null : b(t);
          if (void 0 !== n && !r)
            return console.error(
              "Failed to execute 'measure' on 'Performance': The mark '".concat(
                n,
                "' does not exist."
              )
            );
          if (void 0 !== t && !o)
            return console.error(
              "Failed to execute 'measure' on 'Performance': The mark '".concat(
                t,
                "' does not exist."
              )
            );
          o = o || { startTime: 0 };
          var i = {
            name: e + '',
            entryType: 'measure',
            startTime: (r = r || { startTime: 0 }).startTime,
            duration: (o.startTime || x()) - r.startTime,
          };
          return d(i), i;
        },