javascript - Safari jerky / flickering on $(window).scroll function -

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i'm coming across issue in safari - image flickers or jerks while scrolling, when altering height of 1 element , margin of on page scroll.

this working smoothly , expected far in chrome / firefox (osx), you'll see issue on safari here:

http://jsfiddle.net/y1lrnd24/7/

$(window).scroll(function () {      var imgheight = 300;     var scrolltop = $(window).scrolltop();     var slideheight = imgheight - scrolltop;     var margintop = scrolltop;      if (slideheight > 0) {         $('.slide').css('height', slideheight);         $('#slide-holder').css('paddingtop', margintop);     }  });

(may better illustrated in full-screen: https://jsfiddle.net/y1lrnd24/7/embedded/result/ )

has clues? tried altering margintop paddingtop, had no effect.

any appreciated - hoping quick fix!

edit: thought should add here 'bug' visible when using mouse wheel...

actually, looking @ jsfiddle in safari looks totally normal me. makes me suspect else - plugins installed in safari? have tried reset safari?

http://osxdaily.com/2014/01/09/fix-safari-problems-mac-reset/

from i've read, chrome , safari use same/similar rendering engines...kind of sounds if 1 working , other isn't, might issue safari.


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