test(perf): add macOS Tauri WebView performance harness

Drive the production home traffic graph through embedded WebDriver in an
isolated optimized measurement build. Record attributed WebContent and main
process CPU/RSS distributions across foreground, hidden and restored phases.

Keep replay, raw reports, independent-run comparison, cleanup checks and
focused validation available through project commands. Normal release builds
exclude the automation service and measurement entry points.
This commit is contained in:
Tunglies
2026-09-07 07:13:24 +08:00
parent dd7b032cb1
commit b39c5f9b6d
25 changed files with 5350 additions and 656 deletions
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import { isDeepStrictEqual } from 'node:util'
export const SCHEMA = 'traffic-webview-v3'
export const phases = ['foreground', 'hidden', 'restored']
export const roles = ['webview', 'main']
export const quantile = (values, p) => {
const v = values.filter(Number.isFinite).sort((a, b) => a - b)
if (!v.length) return null
const index = (v.length - 1) * p
return (
v[Math.floor(index)] +
(v[Math.ceil(index)] - v[Math.floor(index)]) * (index % 1)
)
}
export function delta(previous, next) {
if (
!previous ||
previous.pid !== next.pid ||
previous.start !== next.start ||
![previous.time, next.time, previous.cpu, next.cpu].every(
Number.isFinite,
) ||
next.time <= previous.time ||
next.cpu < previous.cpu
)
return null
return ((next.cpu - previous.cpu) / (next.time - previous.time)) * 100000
}
export function summarize(rows, seconds) {
const output = {}
for (const phase of phases)
for (const role of roles) {
const selected = rows.filter((r) => r.phase === phase && r.role === role)
const samples = selected.map((r, i) => ({
...r,
percent: delta(selected[i - 1], r),
cpuDelta: i ? r.cpu - selected[i - 1].cpu : null,
}))
const valid = samples.filter((r) => Number.isFinite(r.percent))
const memory = samples.map((r) => r.rss)
const span =
samples.length > 1 ? samples.at(-1).time - samples[0].time : 0
const continuous =
samples.length > 1 &&
samples.every(
(r) =>
[r.time, r.cpu, r.rss].every(Number.isFinite) &&
Number.isInteger(r.pid) &&
r.pid > 0 &&
/^\d+$/.test(r.start) &&
r.time >= 0 &&
r.cpu >= 0 &&
r.rss > 0,
) &&
samples.every(
(r, i) =>
!i ||
(r.time > samples[i - 1].time &&
r.time - samples[i - 1].time < 2500 &&
r.cpu >= samples[i - 1].cpu &&
r.pid === samples[i - 1].pid &&
r.start === samples[i - 1].start),
)
output[`${phase}/${role}`] = {
count: samples.length,
cpuCount: valid.length,
missing: Math.max(0, Math.floor(seconds) - samples.length),
coverage: Math.min(1, samples.length / seconds),
continuous,
observedSeconds: span / 1000,
intervalCoverage: Math.min(1, span / ((seconds - 1) * 1000)),
cpuMean: null,
cpuP50: quantile(
valid.map((r) => r.percent),
0.5,
),
cpuP95: quantile(
valid.map((r) => r.percent),
0.95,
),
cpuPeak: quantile(
valid.map((r) => r.percent),
1,
),
cpuSeconds: valid.length
? valid.reduce((sum, r) => sum + r.cpuDelta, 0)
: null,
rssP50: quantile(memory, 0.5),
rssP95: quantile(memory, 0.95),
rssPeak: quantile(memory, 1),
rssDelta: continuous ? samples.at(-1).rss - samples[0].rss : null,
rssSlopeBytesPerSecond:
span >= 60000 && continuous
? (samples.at(-1).rss - samples[0].rss) / (span / 1000)
: null,
}
output[`${phase}/${role}`].cpuMean =
valid.length && span > 0
? (output[`${phase}/${role}`].cpuSeconds / span) * 100000
: null
}
return output
}
export function replayValues(sequence) {
return {
up: 100000 + (sequence % 20) * 10000,
down: 500000 + (sequence % 30) * 20000,
}
}
export const validVisibility = (s) =>
typeof s.hidden === 'boolean' &&
(s.phase === 'hidden'
? s.visible === false && s.hidden
: phases.includes(s.phase) && s.visible === true && !s.hidden)
export const validObservation = (s) =>
validWorkload(s) &&
validVisibility(s) &&
s.nativeFocused === false &&
s.appActive === false &&
s.top === true &&
s.clickThrough === true &&
[s.now, s.source, s.worker, s.draw].every(
(v) => Number.isFinite(v) && v > 0,
) &&
s.now >= s.source &&
s.now - s.source < 2500 &&
s.now >= s.worker &&
s.now - s.worker < 3500 &&
s.now >= s.draw &&
(s.phase === 'hidden' || s.now - s.draw < 2500)
export function validWorkload(s) {
if (!s) return false
const expected = replayValues(s.points)
return (
Number.isInteger(s.received) &&
Number.isInteger(s.points) &&
s.points > 0 &&
s.received >= s.points &&
s.received - s.points < 60 &&
s.lastUp === expected.up &&
s.lastDown === expected.down &&
s.gaps === 0
)
}
export function compare(a, b, threshold = null) {
const stats = new Map()
const text = (value) => typeof value === 'string' && value.length > 0
const object = (value) =>
value && typeof value === 'object' && !Array.isArray(value)
const expectedMarks = [
'ready',
...phases.flatMap((phase) => [phase, `${phase}:end`]),
]
const valid = (x) =>
x?.schema === SCHEMA &&
text(x?.harnessSha256) &&
[
'head',
'sourceSha256',
'binarySha256',
'frontendSha256',
'buildSettingsSha256',
'mode',
'buildCommand',
'binary',
'toolchain',
].every((key) => text(x.build?.[key])) &&
typeof x.build.dirty === 'string' &&
object(x.build.buildEnvironment) &&
[
'method',
'mode',
'toolchain',
'buildSettingsSha256',
'platform',
'machine',
'arch',
'host',
'hardware',
'power',
'powerSource',
'webkit',
'replay',
'automation',
].every((key) => text(x.contract?.[key])) &&
object(x.contract.buildEnvironment) &&
x.build.buildSettingsSha256 === x.contract.buildSettingsSha256 &&
[
'warmup',
'intervalMs',
'transitionSeconds',
'readinessAllowanceSeconds',
].every((key) => Number.isFinite(x.contract[key]) && x.contract[key] > 0) &&
x.contract.scenario === 'traffic' &&
typeof x.contract.consoleLocked === 'boolean' &&
x.contract.windowPolicy === 'nonactivating-top-click-through-v1' &&
x.contract.replayMs === 200 &&
x.contract.rangeMinutes === 10 &&
['window', 'viewport'].every(
(key) =>
Array.isArray(x.contract[key]) &&
x.contract[key].length === (key === 'window' ? 2 : 3) &&
x.contract[key].every((v) => Number.isFinite(v) && v > 0),
) &&
Number.isFinite(x.contract?.seconds) &&
x.contract.seconds >= 5 &&
Array.isArray(x.contract.phaseTargets) &&
x.contract.phaseTargets.length === phases.length &&
x.contract.phaseTargets.every((n) => Number.isInteger(n) && n > 0) &&
Array.isArray(x.runs) &&
x.runs.length &&
x.runs.every((r) => {
if (
!r?.ok ||
!Array.isArray(r.samples) ||
!r.samples.every(
(s) => s && roles.includes(s.role) && phases.includes(s.phase),
) ||
!Array.isArray(r.marks) ||
!r.marks.every((m) => m && typeof m.name === 'string')
)
return false
stats.set(r, summarize(r.samples, x.contract.seconds))
return (
r.cleanup?.mainExited &&
r.cleanup?.driverClosed &&
r.cleanup?.webviewExited &&
Array.isArray(r.consoleStates) &&
r.consoleStates.length === expectedMarks.length &&
r.consoleStates.every(
(s, i) =>
s &&
s.name === (i ? expectedMarks[i] : 'initial') &&
typeof s.locked === 'boolean' &&
Number.isFinite(s.time) &&
s.time > 0 &&
(!i || s.time >= r.consoleStates[i - 1].time),
) &&
Number.isInteger(r.replay?.sent) &&
r.replay.sent > 0 &&
Number.isFinite(r.replay.maxLateMs) &&
r.replay.maxLateMs >= 0 &&
r.replay.maxLateMs < x.contract.replayMs &&
!r.replay.error &&
r.actualWarmupMs >= x.contract.warmup * 1000 &&
Array.isArray(r.observations) &&
r.observations.length > 0 &&
r.observations.every(
(s, i) =>
validObservation(s) && (!i || s.now > r.observations[i - 1].now),
) &&
r.marks.length === expectedMarks.length &&
r.marks.every(
(m, i) =>
m.name === expectedMarks[i] &&
Number.isFinite(m.time) &&
m.time > 0 &&
(!i ||
(validObservation({ ...m, phase: m.name.split(':')[0] }) &&
/^[a-f0-9]{64}$/.test(m.pixelsSha256))) &&
(!phases.includes(m.name) ||
(m.target === x.contract.phaseTargets[phases.indexOf(m.name)] &&
m.received === m.target)) &&
(!i || m.time > r.marks[i - 1].time),
) &&
roles.every((role) =>
r.samples
.filter((s) => s.role === role)
.every(
(s, i, rows) =>
!i ||
(s.pid === rows[i - 1].pid &&
s.start === rows[i - 1].start &&
s.time > rows[i - 1].time &&
s.cpu >= rows[i - 1].cpu &&
phases.indexOf(s.phase) >= phases.indexOf(rows[i - 1].phase)),
),
) &&
validStats(stats.get(r)) &&
phases.every((phase) => {
const start = r.marks.find((m) => m.name === phase)
const end = r.marks.find((m) => m.name === `${phase}:end`)
const observed = r.observations.filter((s) => s.phase === phase)
return (
start &&
end &&
observed.length > 0 &&
[
start.deadlineIndex,
end.deadlineIndex,
start.senderSent,
end.senderSent,
].every((n) => Number.isInteger(n) && n >= 0) &&
end.deadlineIndex > start.deadlineIndex &&
end.senderSent >= start.senderSent &&
end.senderSent <= r.replay.sent &&
start.senderSent >= start.received &&
end.senderSent >= end.received &&
Math.abs(
end.received -
start.received -
(end.deadlineIndex - start.deadlineIndex),
) <= 2 &&
observed.every(
(s) =>
s.now >= start.now &&
s.now <= end.now &&
s.received >= start.received &&
s.received <= end.received,
) &&
end.worker > start.worker &&
(phase === 'hidden' ||
(end.draw > start.draw &&
end.pixelsSha256 !== start.pixelsSha256))
)
})
)
})
if (![a, b].every(valid))
return { verdict: 'invalid', reason: 'failed, malformed or missing runs' }
if (
[a, b].some((x) =>
x.runs.some((r) =>
r.consoleStates.some((s) => s.locked !== x.contract.consoleLocked),
),
)
)
return {
verdict: 'incomparable',
reason: 'console lock state changed at observed boundaries',
}
if (
!isDeepStrictEqual(a.contract, b.contract) ||
['mode', 'buildCommand', 'toolchain', 'buildEnvironment'].some(
(key) => !isDeepStrictEqual(a.build[key], b.build[key]),
) ||
a.harnessSha256 !== b.harnessSha256
)
return {
verdict: 'incomparable',
reason: 'harness, platform, build mode, workload or environment differ',
}
for (const phase of phases) {
for (const name of [phase, `${phase}:end`]) {
const sizes = [a, b].map((x) =>
x.runs.map((r) => r.marks.find((m) => m.name === name)?.received),
)
if (!sizes.flat().every(Number.isFinite))
return { verdict: 'invalid', reason: 'missing observed workload size' }
if (
Math.abs(quantile(sizes[0], 0.5) - quantile(sizes[1], 0.5)) > 2 ||
sizes.some((s) => Math.max(...s) - Math.min(...s) > 2)
)
return {
verdict: 'incomparable',
reason: `${name}: input size varies by more than two replay points`,
}
}
}
const same = a.build.binarySha256 === b.build.binarySha256
const enough = a.runs.length >= 3 && b.runs.length >= 3
const metrics = {}
for (const phase of phases)
for (const role of roles)
for (const metric of ['cpuMean', 'rssP50']) {
const key = `${phase}/${role}`
const av = a.runs.map((r) => stats.get(r)[key][metric])
const bv = b.runs.map((r) => stats.get(r)[key][metric])
const before = quantile(av, 0.5),
after = quantile(bv, 0.5)
const noise = Math.max(...av) - Math.min(...av)
const candidateRange = Math.max(...bv) - Math.min(...bv)
const overlap =
Math.max(...av) >= Math.min(...bv) &&
Math.max(...bv) >= Math.min(...av)
metrics[`${key}/${metric}`] = {
before,
after,
delta: after - before,
baselineRange: noise,
candidateRange,
verdict:
same ||
!enough ||
threshold === null ||
!av.every(Number.isFinite) ||
!bv.every(Number.isFinite) ||
overlap ||
Math.abs(after - before) <=
Math.max(
noise,
candidateRange,
(Math.abs(before) * threshold) / 100,
)
? 'inconclusive'
: after < before
? 'lower'
: 'higher',
}
}
return {
verdict: 'inconclusive',
kind: same ? 'A/A' : 'A/B',
reason: same
? 'same binary; natural variation only'
: 'inspect independent-run metrics; no universal pass threshold',
metrics,
}
}
export function markdown(report) {
const lines = [
'# Home traffic graph - replay measurement',
'',
`Success: ${report.runs.filter((r) => r.ok).length}/${report.runs.length}`,
'',
'CPU: one fully occupied core = 100%. Memory: process resident size bytes, not exclusive memory. Null = unavailable; first CPU observation has no delta. Slope requires 60 seconds of continuous observations.',
'',
'| Run / stage / role | CPU mean / P50 / P95 / peak (%) | CPU s | RSS P50 / P95 / peak / delta (bytes) | Samples / coverage |',
'|---|---|---|---|---|',
]
for (const [i, run] of report.runs.entries()) {
if (run.error) lines.push(`\nRun ${i + 1} failed: ${run.error}\n`)
for (const [key, s] of Object.entries(run.stats))
lines.push(
`| ${i + 1}/${key} | ${[s.cpuMean, s.cpuP50, s.cpuP95, s.cpuPeak].map((v) => v?.toFixed(2) ?? 'unavailable').join(' / ')} | ${s.cpuSeconds?.toFixed(3) ?? 'unavailable'} | ${[s.rssP50, s.rssP95, s.rssPeak, s.rssDelta].map((v) => v ?? 'unavailable').join(' / ')} | ${s.count} / ${(s.coverage * 100).toFixed(1)}% |`,
)
}
lines.push(
'',
'Scope: loopback replay → public traffic append boundary → production Worker → homepage Canvas component. Mihomo and its network/subscription chain are not running. Shared GPU/network processes are unavailable and excluded. Process statistics do not identify function hotspots, component CPU or retained objects; memory growth is not proof of a leak.',
'',
'Next measurement: use WebKit CPU sampling for the highest-CPU foreground/restored phase; use Allocation/Heap captures for repeatable RSS growth. React Compiler is an untested local A/B candidate only.',
)
return lines.join('\n') + '\n'
}
export const validStats = (stats) =>
Object.values(stats).every(
(s) =>
s.continuous &&
s.coverage >= 0.8 &&
s.intervalCoverage >= 0.8 &&
s.cpuCount >= 3,
)