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POJs Animation using setInterval getting slow over time
 

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  1. POJs Animation using setInterval getting slow over time
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    <p>I have a web site which displays a portfolio using this scrollbar <a href="http://manos.malihu.gr/jquery-custom-content-scroller/" rel="nofollow">http://manos.malihu.gr/jquery-custom-content-scroller/</a> .</p> <p>I want to have an automatic scroll when the page is fully loaded. When a user pass over the portfolio it stops the scroll and whe, he leaves it starts moving again.</p> <p>It currently works well but sometimes it's getting slow or sluggish randomly. Is there something wrong with my js function?</p> <p>Here's the page having problems : <a href="http://www.lecarreau.net/new/spip.php?rubrique5" rel="nofollow">http://www.lecarreau.net/new/spip.php?rubrique5</a> (I need the change the hosting provider, I know the site is slow).</p> <p>This is the function:</p> <pre><code>(function($){ var timerId = 0; $(window).load(function(){ $("#carousel").show().mCustomScrollbar( { mouseWheel:false, mouseWheelPixels:50, horizontalScroll:true, setHeight:370, scrollButtons:{ enable: true, scrollSpeed:50 }, advanced:{ updateOnContentResize:true } }); timerId = setInterval(function(){myTimer()},50); $('#carousel').mouseenter(function () { clearInterval(timerId); }); $('#carousel').mouseleave(function () { timerId = setInterval(function(){myTimer()},50); }); }); })(jQuery); function myTimer() { var width = $(".mCSB_container").width(); var left = $(".mCSB_container").position().left; if (width-left&gt;0) { var scrollTo = -left+4; $("#carousel").mCustomScrollbar("scrollTo", scrollTo); } } </code></pre> <p>Is there something obvious I'm missing?</p>
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    1. CODon't use `setIntervcal`, because: http://ejohn.org/blog/how-javascript-timers-work/ For animations you want `Window.requestAnimationFrame()` and not the timeout functions anyway: http://creativejs.com/resources/requestanimationframe/ - Mozilla spec: https://developer.mozilla.org/en/docs/Web/API/window.requestAnimationFrame
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      1. USJohn Smith
 

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