| 1 | import { inBrowser } from './env'
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| 2 |
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| 3 | export let mark
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| 4 | export let measure
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| 5 |
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| 6 | if (process.env.NODE_ENV !== 'production') {
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| 7 | const perf = inBrowser && window.performance
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| 8 | /* istanbul ignore if */
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| 9 | if (
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| 10 | perf &&
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| 11 | perf.mark &&
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| 12 | perf.measure &&
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| 13 | perf.clearMarks &&
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| 14 | perf.clearMeasures
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| 15 | ) {
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| 16 | mark = tag => perf.mark(tag)
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| 17 | measure = (name, startTag, endTag) => {
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| 18 | perf.measure(name, startTag, endTag)
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| 19 | perf.clearMarks(startTag)
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| 20 | perf.clearMarks(endTag)
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| 21 | // perf.clearMeasures(name)
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| 22 | }
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| 23 | }
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| 24 | }
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