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fix(apm): Use Performance API for timings when available #2492

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Merged
merged 2 commits into from
Mar 12, 2020
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fix(apm): Use Performance API for timings when available #2492

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fix(apm): Use Performance API for timings when available
rhcarvalho Mar 12, 2020
c2e33ca
chore: Update CHANGELOG
rhcarvalho Mar 12, 2020
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14 changes: 3 additions & 11 deletions packages/utils/src/misc.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -378,19 +378,11 @@ export const crossPlatformPerformance: Pick<Performance, 'now' | 'timeOrigin'> =
// is not as widely supported. Namely, performance.timeOrigin is undefined in Safari as of writing.
// tslint:disable-next-line:strict-type-predicates
if (performance.timeOrigin === undefined) {
// For webworkers it could mean we don't have performance.timing then we fallback
// tslint:disable-next-line:deprecation
if (!performance.timing) {
return performanceFallback;
}
// tslint:disable-next-line:deprecation
if (!performance.timing.navigationStart) {
return performanceFallback;
}

// As of writing, performance.timing is not available in Web Workers in mainstream browsers, so it is not always a
// valid fallback. In the absence of a initial time provided by the browser, fallback to INITIAL_TIME.
// @ts-ignore
// tslint:disable-next-line:deprecation
performance.timeOrigin = performance.timing.navigationStart;
performance.timeOrigin = (performance.timing && performance.timing.navigationStart) || INITIAL_TIME;
}
}

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