perf.ts
568 Bytes
import { inBrowser } from './env'
export let mark
export let measure
if (__DEV__) {
const perf = inBrowser && window.performance
/* istanbul ignore if */
if (
perf &&
// @ts-ignore
perf.mark &&
// @ts-ignore
perf.measure &&
// @ts-ignore
perf.clearMarks &&
// @ts-ignore
perf.clearMeasures
) {
mark = tag => perf.mark(tag)
measure = (name, startTag, endTag) => {
perf.measure(name, startTag, endTag)
perf.clearMarks(startTag)
perf.clearMarks(endTag)
// perf.clearMeasures(name)
}
}
}