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perf.ts
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import { BackendContext, DevtoolsBackend } from '@vue-devtools/app-backend-api'
import { App, ComponentInstance } from '@vue/devtools-api'
import { BridgeSubscriptions, raf, SharedData } from '@vue-devtools/shared-utils'
import { addTimelineEvent } from './timeline'
import { getAppRecord } from './app'
import { getComponentId, sendComponentTreeData } from './component'
import { isSubscribed } from './util/subscriptions'
export async function performanceMarkStart (
app: App,
uid: number,
instance: ComponentInstance,
type: string,
time: number,
ctx: BackendContext,
) {
try {
if (!SharedData.performanceMonitoringEnabled) return
const appRecord = await getAppRecord(app, ctx)
const componentName = await appRecord.backend.api.getComponentName(instance)
const groupId = ctx.perfUniqueGroupId++
const groupKey = `${uid}-${type}`
appRecord.perfGroupIds.set(groupKey, { groupId, time })
await addTimelineEvent({
layerId: 'performance',
event: {
time,
data: {
component: componentName,
type,
measure: 'start',
},
title: componentName,
subtitle: type,
groupId,
},
}, app, ctx)
if (markEndQueue.has(groupKey)) {
const {
app,
uid,
instance,
type,
time,
} = markEndQueue.get(groupKey)
markEndQueue.delete(groupKey)
await performanceMarkEnd(
app,
uid,
instance,
type,
time,
ctx,
)
}
} catch (e) {
if (SharedData.debugInfo) {
console.error(e)
}
}
}
const markEndQueue = new Map<string, {
app: App
uid: number
instance: ComponentInstance
type: string
time: number
}>()
export async function performanceMarkEnd (
app: App,
uid: number,
instance: ComponentInstance,
type: string,
time: number,
ctx: BackendContext,
) {
try {
if (!SharedData.performanceMonitoringEnabled) return
const appRecord = await getAppRecord(app, ctx)
const componentName = await appRecord.backend.api.getComponentName(instance)
const groupKey = `${uid}-${type}`
const groupInfo = appRecord.perfGroupIds.get(groupKey)
if (!groupInfo) {
markEndQueue.set(groupKey, {
app,
uid,
instance,
type,
time,
})
return
}
const { groupId, time: startTime } = groupInfo
const duration = time - startTime
await addTimelineEvent({
layerId: 'performance',
event: {
time,
data: {
component: componentName,
type,
measure: 'end',
duration: {
_custom: {
type: 'Duration',
value: duration,
display: `${duration} ms`,
},
},
},
title: componentName,
subtitle: type,
groupId,
},
}, app, ctx)
// Mark on component
const tooSlow = duration > 10
if (tooSlow || instance.__VUE_DEVTOOLS_SLOW__) {
let change = false
if (tooSlow && !instance.__VUE_DEVTOOLS_SLOW__) {
instance.__VUE_DEVTOOLS_SLOW__ = {
duration: null,
measures: {},
}
}
const data = instance.__VUE_DEVTOOLS_SLOW__
if (tooSlow && (data.duration == null || data.duration < duration)) {
data.duration = duration
change = true
}
if (data.measures[type] == null || data.measures[type] < duration) {
data.measures[type] = duration
change = true
}
if (change) {
// Update component tree
const id = await getComponentId(app, uid, instance, ctx)
if (isSubscribed(BridgeSubscriptions.COMPONENT_TREE, sub => sub.payload.instanceId === id)) {
raf(() => {
sendComponentTreeData(appRecord, id, ctx.currentAppRecord.componentFilter, null, ctx)
})
}
}
}
} catch (e) {
if (SharedData.debugInfo) {
console.error(e)
}
}
}
export function handleAddPerformanceTag (backend: DevtoolsBackend, ctx: BackendContext) {
backend.api.on.visitComponentTree(payload => {
if (payload.componentInstance.__VUE_DEVTOOLS_SLOW__) {
const { duration, measures } = payload.componentInstance.__VUE_DEVTOOLS_SLOW__
let tooltip = '<div class="grid grid-cols-2 gap-2 font-mono text-xs">'
for (const type in measures) {
const d = measures[type]
tooltip += `<div>${type}</div><div class="text-right text-black rounded px-1 ${d > 30 ? 'bg-red-400' : d > 10 ? 'bg-yellow-400' : 'bg-green-400'}">${Math.round(d * 1000) / 1000} ms</div>`
}
tooltip += '</div>'
payload.treeNode.tags.push({
backgroundColor: duration > 30 ? 0xF87171 : 0xFBBF24,
textColor: 0x000000,
label: `${Math.round(duration * 1000) / 1000} ms`,
tooltip,
})
}
})
}