在页面中获取两个关键指标

log-web-pref.js

function test(cond) {
	'use strict'
	let data = {}
	data.N0 = performance.timing.navigationStart
	data.L0 = performance.timing.loadEventStart
	data.P = window.chrome.loadTimes().firstPaintTime * 1000
	data.metric1 = data.P - data.N0
	data.metric2 = data.L0 - data.N0
	console.log(`${cond} | ${data.metric1} | ${data.metric2}`)
}
test('2g')