Timing and navigation data for this window.
Other resources
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Measuring page load speed with navigation timeing from HTML5Rocks.
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Navigation timing specification from W3C.
Source
@DomName('Window.performance')
@DocsEditable()
@SupportedBrowser(SupportedBrowser.CHROME)
@SupportedBrowser(SupportedBrowser.FIREFOX)
@SupportedBrowser(SupportedBrowser.IE)
Performance get performance => _blink.BlinkWindow.instance.performance_Getter_(this);