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Olivier Payen 989546f97e Use monotonic clock for performance.now() (#33983 )

Summary:
In https://github.com/facebook/react-native/pull/32695, the `Performance.now()` implementation changed to use unix epoch timestamps instead of a monotonic clock.

This is problematic, because it means that performance measurements get skewed if the device clock changes between two measurements.

With this change, the clock is now monotonic (and the implementation stays consistent between platforms).

More details and repro steps can be found in [this issue](https://github.com/facebook/react-native/issues/33977)
Closes https://github.com/facebook/react-native/issues/33977

## Changelog

[General] [Fixed] - Use monotonic clock for performance.now()

Pull Request resolved: https://github.com/facebook/react-native/pull/33983

Test Plan:
Run on iOS and Android:
```
const now = global.performance.now()
console.log(`${Platform.OS}: ${now}`)
```

Reviewed By: JoshuaGross, cipolleschi

Differential Revision: D37066999

Pulled By: dmitryrykun

fbshipit-source-id: 298547bf39faea1b025c17ff2d2e1a03f929865b

2022-08-02 12:25:34 +01:00

libs

Upgrade Android support library to version 28 in RN

2019-01-22 10:44:53 -08:00

src

Use monotonic clock for performance.now() (#33983 )

2022-08-02 12:25:34 +01:00

.npmignore

…

Android-prebuilt.mk

Update copyright headers from Facebook to Meta

2021-12-30 15:11:21 -08:00