”`
(function () { var noop = function noop() {} if (“performance” in window === false) { window.performance = {}; } window.performance.mark = performance.mark || noop; window.performance.measure = performance.measure || noop; if (“now” in window.performance === false) { var nowOffset = Date.now(); if (performance.timing && performance.timing.navigationStart) { nowOffset = performance.timing.navigationStart; } window.performance.now = function now() { return Date.now() - nowOffset; }; } })(); (fun