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import { chromium } from '@playwright/test'
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/**
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* /table-test 探针 v8 —— 可靠 A/B + 类名抖动取证（只读诊断）。
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*
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* v5 的 CSS A/B 数值自相矛盾（同一项时好时坏），原因是单轮测量方差极大。
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* 本版改为**交替、多轮、取中位**：BASE, VAR, BASE, VAR, BASE, VAR —— 这样
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* 温度/GC/后台负载等慢变因素在两组间被平摊，差值才可信。
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*
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* 同时取三样硬证据：
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* ① 横向滚动时 td 的 class 到底从什么变成什么（类名抖动取证）
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* ② 每帧的 RecalcStyleCount / LayoutCount（用 CDP 计数器，不受帧率方差影响）
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* ③ 单次点击的 trace 归因（首次 / 换行 / 同格 / 换列）
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*/
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const BASE_URL = process.env.PROBE_URL || 'http://127.0.0.1:5090'
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const MENU_CODE = 'menu.table_test'
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async function makePage() {
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const browser = await chromium.launch({ headless: false })
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const context = await browser.newContext({ viewport: { width: 1600, height: 900 } })
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await context.route('**/api/data/loaddata', async (route) => {
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let viewName = ''
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try {
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viewName = JSON.parse(route.request().postData() || '').view_name || ''
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} catch {
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/* ignore */
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}
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const response = await route.fetch()
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if (viewName !== 's_power' && viewName !== 's_user_power') return route.fulfill({ response })
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let json
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try {
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json = await response.json()
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} catch {
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return route.fulfill({ response })
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}
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const rows = Array.isArray(json?.data) ? json.data : []
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if (viewName === 's_power') {
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if (!rows.some((r) => r.b_id === MENU_CODE)) rows.push({ b_id: MENU_CODE, b_canuse: 1 })
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} else if (!rows.some((r) => r.b_power_id === MENU_CODE)) {
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rows.push({ b_user_id: 'demo_zhangwei', b_power_id: MENU_CODE, b_canuse: 1 })
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}
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json.data = rows
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await route.fulfill({
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response,
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body: JSON.stringify(json),
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headers: { ...response.headers(), 'content-type': 'application/json' },
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})
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})
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const page = await context.newPage()
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page.on('pageerror', (e) => console.log('[pageerror]', String(e).slice(0, 200)))
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await page.goto(`${BASE_URL}/table-test`, { waitUntil: 'domcontentloaded' })
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await page.waitForSelector('.stk-table', { timeout: 90000 })
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await page.waitForTimeout(3000)
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return { browser, context, page }
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}
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/** 一次滚动测量：返回帧间隔统计 + CDP 计数器增量 */
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async function scrollMeasure(page, context, { axis = 'y', steps = 90, px = 60 } = {}) {
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const client = await context.newCDPSession(page)
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await client.send('Performance.enable')
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const readCounters = async () => {
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const m = await client.send('Performance.getMetrics')
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const o = {}
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for (const x of m.metrics) o[x.name] = x.value
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return o
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}
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const before = await readCounters()
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const frames = await page.evaluate(
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async ({ axis, steps, px }) => {
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const cont = document.querySelector('.stk-table')
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cont.scrollTop = 0
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cont.scrollLeft = 0
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await new Promise((r) => requestAnimationFrame(r))
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const out = []
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let last = performance.now()
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let stop = false
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const tick = () => {
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const now = performance.now()
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out.push(now - last)
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last = now
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if (!stop) requestAnimationFrame(tick)
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}
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requestAnimationFrame(tick)
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for (let i = 0; i < steps; i += 1) {
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await new Promise((r) => requestAnimationFrame(r))
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if (axis === 'y') {
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const max = cont.scrollHeight - cont.clientHeight
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cont.scrollTop = cont.scrollTop >= max - 1 ? 0 : Math.min(max, cont.scrollTop + px)
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} else {
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const max = cont.scrollWidth - cont.clientWidth
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cont.scrollLeft = cont.scrollLeft >= max - 1 ? 0 : Math.min(max, cont.scrollLeft + px)
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}
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}
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stop = true
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return out
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},
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{ axis, steps, px },
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)
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const after = await readCounters()
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await client.detach()
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const d = (k) => +((after[k] ?? 0) - (before[k] ?? 0)).toFixed(2)
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const sorted = [...frames].sort((a, b) => a - b)
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const avg = frames.reduce((a, b) => a + b, 0) / frames.length
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const q = (p) => sorted[Math.min(sorted.length - 1, Math.floor(sorted.length * p))]
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return {
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fps: +(1000 / avg).toFixed(1),
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avgMs: +avg.toFixed(1),
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p50: +q(0.5).toFixed(1),
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p95: +q(0.95).toFixed(1),
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frames: frames.length,
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recalcStyle: d('RecalcStyleCount'),
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layoutCount: d('LayoutCount'),
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styleMs: d('RecalcStyleDuration'),
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layoutMs: d('LayoutDuration'),
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taskMs: d('TaskDuration'),
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scriptMs: d('ScriptDuration'),
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perFrame: {
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styleMs: +(d('RecalcStyleDuration') / frames.length * 1000).toFixed(2),
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layoutMs: +(d('LayoutDuration') / frames.length * 1000).toFixed(2),
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taskMs: +(d('TaskDuration') / frames.length * 1000).toFixed(2),
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scriptMs: +(d('ScriptDuration') / frames.length * 1000).toFixed(2),
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},
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}
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}
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const median = (arr) => {
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const s = [...arr].sort((a, b) => a - b)
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return s[Math.floor(s.length / 2)]
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}
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console.log('================= 打开页面 =================')
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const { browser, context, page } = await makePage()
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/* ============================================================
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* ① 横向滚动时到底哪些 class 在抖
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* ============================================================ */
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console.log('\n=========== ① 横向滚动：类名抖动取证 ===========')
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const churn = await page.evaluate(async () => {
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const cont = document.querySelector('.stk-table')
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cont.scrollLeft = 0
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await new Promise((r) => requestAnimationFrame(r))
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// 记录某个 td 的 class 变化序列
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const td = document.querySelector('.stk-tbody-main td.fixed-cell')
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const seq = []
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const attrCount = {}
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let total = 0
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const obs = new MutationObserver((recs) => {
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for (const m of recs) {
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if (m.type !== 'attributes') continue
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total += 1
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const t = m.target
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attrCount[m.attributeName] = (attrCount[m.attributeName] || 0) + 1
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if (t === td && m.attributeName === 'class') {
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const v = t.getAttribute('class') || ''
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if (seq[seq.length - 1] !== v) seq.push(v)
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}
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}
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})
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obs.observe(document.querySelector('.stk-tbody-main'), {
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attributes: true,
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subtree: true,
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attributeOldValue: true,
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})
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const FRAMES = 40
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for (let i = 0; i < FRAMES; i += 1) {
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await new Promise((r) => requestAnimationFrame(r))
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const max = cont.scrollWidth - cont.clientWidth
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cont.scrollLeft = cont.scrollLeft >= max - 1 ? 0 : Math.min(max, cont.scrollLeft + 80)
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}
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await new Promise((r) => setTimeout(r, 100))
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obs.disconnect()
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// 统计有多少个不同的 td 被改了 class
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return {
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FRAMES,
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totalAttrWrites: total,
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perFrame: +(total / FRAMES).toFixed(1),
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attrNames: attrCount,
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sampleTdClassSeq: seq.slice(0, 10),
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fixedCellCount: document.querySelectorAll('.stk-tbody-main td.fixed-cell').length,
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tdCount: document.querySelectorAll('.stk-tbody-main td').length,
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}
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})
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console.log(JSON.stringify(churn, null, 2))
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/* ============================================================
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* ② 交替 A/B：用 CDP 计数器（不受帧率方差影响）
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* ============================================================ */
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const VARIANTS = {
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'V0 基线（不动 CSS）': '',
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'V1 去 td/th 背景渐变（格线）': `.stk-table td, .stk-table th { background-image: none !important; }`,
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'V2 去 sticky 固定列': `.stk-table td.fixed-cell, .stk-table th.fixed-cell { position: static !important; }`,
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'V3 去全部 :has() 规则（重写为不匹配）': `
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.g3-table td:has(> .g3-table__cell-editor-root.is-cell-editing),
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.g3-table td:has(> .g3-table__cell-editor-root.is-editor-error),
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.g3-table td:has(> .g3-table__cell-display.is-editor-error),
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.g3-table td:has(> .g3-table__cell-editor-root.is-editor-warning),
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.g3-table td:has(> .g3-table__cell-display.is-editor-warning),
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.g3-table td:has(> .g3-table__cell-display.g3-table__cell-readonly) { background-color: inherit !important; box-shadow: none !important; }`,
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'V4 去 box-shadow（含 100vmax 叠色）': `.stk-table td, .stk-table th, .stk-table tr { box-shadow: none !important; }`,
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'V5 去文字溢出省略': `.stk-table .table-cell-wrapper { text-overflow: clip !important; overflow: visible !important; }`,
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'V6 V1+V2+V4 组合': `
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.stk-table td, .stk-table th { background-image: none !important; box-shadow: none !important; }
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.stk-table td.fixed-cell, .stk-table th.fixed-cell { position: static !important; }`,
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}
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async function applyVariant(css) {
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await page.evaluate((c) => {
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document.querySelectorAll('style[data-probe]').forEach((s) => s.remove())
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if (!c) return
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const s = document.createElement('style')
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s.dataset.probe = '1'
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s.textContent = c
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document.head.appendChild(s)
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}, css)
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await page.waitForTimeout(600)
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}
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console.log('\n=========== ② 交替 A/B（横向滚动，CDP 计数器）===========')
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console.log('每格显示：fps / 每帧 样式重算ms + 布局ms + 主线程任务ms')
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const ROUNDS = 3
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for (const [label, css] of Object.entries(VARIANTS)) {
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if (label.startsWith('V0')) continue
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const baseRuns = []
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const varRuns = []
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for (let r = 0; r < ROUNDS; r += 1) {
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await applyVariant('')
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baseRuns.push(await scrollMeasure(page, context, { axis: 'x', steps: 60, px: 80 }))
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await applyVariant(css)
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varRuns.push(await scrollMeasure(page, context, { axis: 'x', steps: 60, px: 80 }))
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}
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await applyVariant('')
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const f = (runs, k) => median(runs.map((r) => r[k]))
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const pf = (runs, k) => median(runs.map((r) => r.perFrame[k]))
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console.log(
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`\n${label}\n 基线 : ${String(f(baseRuns, 'fps')).padStart(5)}fps | style ${String(pf(baseRuns, 'styleMs')).padStart(5)}ms | layout ${String(pf(baseRuns, 'layoutMs')).padStart(5)}ms | task ${String(pf(baseRuns, 'taskMs')).padStart(6)}ms`,
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)
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console.log(
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` 变体 : ${String(f(varRuns, 'fps')).padStart(5)}fps | style ${String(pf(varRuns, 'styleMs')).padStart(5)}ms | layout ${String(pf(varRuns, 'layoutMs')).padStart(5)}ms | task ${String(pf(varRuns, 'taskMs')).padStart(6)}ms`,
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)
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const dfps = +(f(varRuns, 'fps') - f(baseRuns, 'fps')).toFixed(1)
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const dstyle = +(pf(varRuns, 'styleMs') - pf(baseRuns, 'styleMs')).toFixed(2)
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const dlayout = +(pf(varRuns, 'layoutMs') - pf(baseRuns, 'layoutMs')).toFixed(2)
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const dtask = +(pf(varRuns, 'taskMs') - pf(baseRuns, 'taskMs')).toFixed(2)
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console.log(
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` 差值 : fps ${dfps > 0 ? '+' : ''}${dfps} | style ${dstyle > 0 ? '+' : ''}${dstyle}ms | layout ${dlayout > 0 ? '+' : ''}${dlayout}ms | task ${dtask > 0 ? '+' : ''}${dtask}ms`,
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)
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}
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/* ============================================================
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* ③ 单次点击的 trace 归因（分场景，各 3 次取中位）
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* ============================================================ */
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console.log('\n=========== ③ 单次点击 trace 归因 ===========')
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async function traceOne(fn) {
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const client = await context.newCDPSession(page)
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const events = []
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client.on('Tracing.dataCollected', ({ value }) => events.push(...value))
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const done = new Promise((res) => client.once('Tracing.tracingComplete', res))
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await client.send('Tracing.start', {
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categories: 'devtools.timeline,blink.user_timing',
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options: 'sampling',
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transferMode: 'ReportEvents',
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})
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await fn()
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await client.send('Tracing.end')
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await done
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await client.detach()
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// 主线程总忙（只取叶子事件，避免嵌套重复计数）
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const isLeaf = (e, all) => !all.some((o) => o !== e && o.tid === e.tid && o.ph === 'X' && o.ts <= e.ts && o.ts + o.dur >= e.ts + e.dur)
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const main = events.filter((e) => e.ph === 'X' && e.dur)
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// 选主线程 tid
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const byTid = new Map()
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for (const e of main) byTid.set(e.tid, (byTid.get(e.tid) || 0) + e.dur)
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const tid = [...byTid.entries()].sort((a, b) => b[1] - a[1])[0]?.[0]
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const mine = main.filter((e) => e.tid === tid)
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const leaves = mine.filter((e) => isLeaf(e, mine))
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const busy = leaves.reduce((a, e) => a + e.dur, 0)
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const agg = new Map()
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for (const e of leaves) agg.set(e.name, (agg.get(e.name) || 0) + e.dur)
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const top = [...agg.entries()].sort((a, b) => b[1] - a[1]).slice(0, 8)
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return { busyMs: +(busy / 1000).toFixed(1), top: top.map(([k, v]) => [k, +(v / 1000).toFixed(1)]) }
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}
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async function clickAt(rowIdx, colIdx, settle = 300) {
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await page.waitForTimeout(settle)
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return page.evaluate(
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async ({ rowIdx, colIdx }) => {
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const tr = [...document.querySelectorAll('.stk-tbody-main tr')][rowIdx]
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if (!tr) return { error: 'no row' }
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const td = [...tr.querySelectorAll('td')][colIdx]
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if (!td) return { error: 'no td' }
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const r = td.getBoundingClientRect()
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if (r.top < 0 || r.bottom > window.innerHeight) return { error: 'offscreen' }
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const cx = r.left + r.width / 2
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const cy = r.top + r.height / 2
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const t0 = performance.now()
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for (const type of ['pointerdown', 'mousedown', 'pointerup', 'mouseup', 'click']) {
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const Ctor = type.startsWith('pointer') ? PointerEvent : MouseEvent
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td.dispatchEvent(
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new Ctor(type, { bubbles: true, cancelable: true, clientX: cx, clientY: cy, button: 0 }),
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)
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}
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const dispatchMs = +(performance.now() - t0).toFixed(2)
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// 等两帧，让 Vue flush + 布局绘制完成
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await new Promise((r2) => requestAnimationFrame(r2))
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await new Promise((r2) => requestAnimationFrame(r2))
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return { dispatchMs, totalMs: +(performance.now() - t0).toFixed(1) }
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},
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{ rowIdx, colIdx },
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)
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}
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async function scenario(label, fn, reps = 3) {
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const busy = []
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const detail = []
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for (let i = 0; i < reps; i += 1) {
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const t = await traceOne(fn)
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busy.push(t.busyMs)
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detail.push(t)
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}
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const allNames = new Map()
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for (const d of detail) for (const [k, v] of d.top) allNames.set(k, [...(allNames.get(k) || []), v])
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const top = [...allNames.entries()]
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.map(([k, vs]) => [k, median(vs)])
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.sort((a, b) => b[1] - a[1])
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.slice(0, 6)
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console.log(`\n${label}`)
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console.log(` 主线程忙(中位) ${median(busy)}ms [全部: ${busy.join(', ')}]`)
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console.log(` 主要事件: ${top.map(([k, v]) => `${k}=${v}ms`).join(' ')}`)
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return { busy: median(busy), top }
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}
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// 重新加载，保证「首次点击」是真的首次
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await page.reload({ waitUntil: 'domcontentloaded' })
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await page.waitForSelector('.stk-table', { timeout: 90000 })
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await page.waitForTimeout(3000)
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await scenario('A. 首次点击某格（editingActive false→true，全表列重建）', () => clickAt(3, 6, 400))
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await scenario('B. 换行点击（editingActive 保持 true）', () => clickAt(9, 6, 400))
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await scenario('C. 反复点同一格', () => clickAt(9, 6, 250))
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await scenario('D. 同行换列（换到 select 列）', () => clickAt(9, 2, 350))
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await scenario('E. 点冻结列（fixed left）', () => clickAt(9, 2, 350).then(() => clickAt(9, 0, 350)))
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/* ============================================================
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* ④ 汇总
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* ============================================================ */
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console.log('\n=========== ④ 页面规模 ===========')
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const size = await page.evaluate(() => ({
|
||||
tds: document.querySelectorAll('.stk-tbody-main td').length,
|
||||
trs: document.querySelectorAll('.stk-tbody-main tr').length,
|
||||
ths: document.querySelectorAll('thead th').length,
|
||||
stickyCells: document.querySelectorAll('.stk-tbody-main td.fixed-cell').length,
|
||||
cellsWithGradientBg: [...document.querySelectorAll('.stk-tbody-main td')].filter((td) =>
|
||||
/gradient/.test(getComputedStyle(td).backgroundImage),
|
||||
).length,
|
||||
cellsWithShadow: [...document.querySelectorAll('.stk-tbody-main td')].filter(
|
||||
(td) => getComputedStyle(td).boxShadow !== 'none',
|
||||
).length,
|
||||
hasRulesInSheets: [...document.styleSheets].reduce((n, s) => {
|
||||
try {
|
||||
return n + [...s.cssRules].filter((r) => r.selectorText && r.selectorText.includes(':has(')).length
|
||||
} catch {
|
||||
return n
|
||||
}
|
||||
}, 0),
|
||||
totalRules: [...document.styleSheets].reduce((n, s) => {
|
||||
try {
|
||||
return n + s.cssRules.length
|
||||
} catch {
|
||||
return n
|
||||
}
|
||||
}, 0),
|
||||
}))
|
||||
console.log(JSON.stringify(size, null, 2))
|
||||
|
||||
await browser.close()
|
||||
Reference in new issue
Block a user