description

# performance property Null safety

Performance performance
@SupportedBrowser(SupportedBrowser.CHROME), @SupportedBrowser(SupportedBrowser.FIREFOX), @SupportedBrowser(SupportedBrowser.IE)

Timing and navigation data for this window.

## Other resources

- Measuring page load speed with navigation timeing from HTML5Rocks.
- Navigation timing specification from W3C.

## Implementation

    @SupportedBrowser(SupportedBrowser.CHROME)
    @SupportedBrowser(SupportedBrowser.FIREFOX)
    @SupportedBrowser(SupportedBrowser.IE)
    Performance get performance native;