Originally reported by anonymous at: http://bugs.jquery.com/ticket/14147

Accessing some of the event properties while copying them (like jQuery.event.fix() does in event[ prop ] = originalEvent[ prop ] at  https://github.com/jquery/jquery/blob/master/src/event.js#L511) may force style recalculation and layout.

Screenshots of Timeline in Chrome Developer Tools:  http://i.imgur.com/Zuh6WDE.png  http://i.imgur.com/JWLYF2N.png

Issue reported for jQuery 1.10.2