43 lines
1.0 KiB
TypeScript
43 lines
1.0 KiB
TypeScript
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import { ComponentInternalInstance, formatComponentName } from './component'
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let supported: boolean
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let perf: any
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export function startMeasure(
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instance: ComponentInternalInstance,
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type: string
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) {
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if (!instance.appContext) debugger
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if (instance.appContext.config.performance && isSupported()) {
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perf.mark(`vue-${type}-${instance.uid}`)
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}
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}
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export function endMeasure(instance: ComponentInternalInstance, type: string) {
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if (instance.appContext.config.performance && isSupported()) {
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const startTag = `vue-${type}-${instance.uid}`
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const endTag = startTag + `:end`
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perf.mark(endTag)
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perf.measure(
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`<${formatComponentName(instance.type)}> ${type}`,
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startTag,
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endTag
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)
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perf.clearMarks(startTag)
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perf.clearMarks(endTag)
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}
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}
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function isSupported() {
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if (supported !== undefined) {
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return supported
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}
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if (typeof window !== 'undefined' && window.performance) {
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supported = true
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perf = window.performance
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} else {
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supported = false
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}
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return supported
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}
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