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performance

The global performance object, as defined in Web specifications.

Reference

Instance properties​

eventCounts​

See documentation in MDN.

memory​

See documentation in MDN.

rnStartupTiming βš οΈβ€‹

Non-standard

This is a React Native specific extension.

Provides information about the startup time of the application.

ts
getrnStartupTiming(): ReactNativeStartupTiming;

The ReactNativeStartupTiming interface provides the following fields:

NameTypeDescription
startTimenumber | voidWhen the React Native runtime initialization was started.
executeJavaScriptBundleEntryPointStartnumber | voidWhen the execution of the application bundle was started.
endTimenumber | voidWhen the React Native runtime was fully initialized.

timeOrigin​

Partial support

Provides the number of milliseconds from the UNIX epoch until system boot, instead of the number of milliseconds from the UNIX epoch until app startup.

See documentation in MDN.

Instance methods​

clearMarks()​

See documentation in MDN.

clearMeasures()​

See documentation in MDN.

getEntries()​

See documentation in MDN.

getEntriesByName()​

See documentation in MDN.

getEntriesByType()​

See documentation in MDN.

mark()​

See documentation in MDN.

measure()​

See documentation in MDN.

now()​

Partial support

Provides the number of milliseconds from system boot, instead of the number of milliseconds from app startup.

See documentation in MDN.

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