<![CDATA[Performance Issue on OS X El Capitan]]>Hello Everyone,

I'm using Opera on OS X El Capitan 10.11.1 (15B42), and after upgrade to version 33.0.1990.115 (Stable) I faced with strange performance issue, that seems to the rendering acceleration in Opera is not always turns on.

If run Opera with turned on system transparency (the box "Reduce Transparency" on "System Preferences" -> "Accessibility" -> "Display" is unchecked), all websites are rendered very slowly, and when try to scroll a page it brings to rendering lags and freezes and CPU load is grows up to 100%.

But after a set of experiments I discovered that if turn the system transparency off when Opera doesn't running (by checking the box "Reduce Transparency"), start Opera after this, and turn the transparency back on (by un-checking the box "Reduce Transparency") when Opera will running already - the issue is disappears, scrolling works smoothly and does not occurs too much CPU load.

If restart Opera (with keeping the "Reduce Transparency" unchecked) - the issue comes back... I reproduced it several times. Opera 34.0.2036.25 (Stable) also have this problem. The similar problem (CPU load) is mentioned here.

TL;DR we have two situation, and in both of them we running Opera with turned on system transparency:

  1. "Reduce Transparency" unchecked -> start Opera -> the perfomance issue is present;
  2. "Reduce Transparency" checked -> start Opera -> uncheck "Reduce Transparency" -> the performance issue doesn't appears.

How it could be fixed?

p.s. sorry for my english

]]>https://forums.opera.com/topic/12994/performance-issue-on-os-x-el-capitanRSS for NodeThu, 14 May 2026 14:19:59 GMTThu, 10 Dec 2015 09:41:39 GMT60<![CDATA[Reply to Performance Issue on OS X El Capitan on Wed, 13 Jan 2016 09:50:07 GMT]]>Thank you for the fix!

]]>https://forums.opera.com/post/91569https://forums.opera.com/post/91569Wed, 13 Jan 2016 09:50:07 GMT<![CDATA[Reply to Performance Issue on OS X El Capitan on Tue, 12 Jan 2016 12:49:49 GMT]]>The build has now been released, if you have 34.0.2036.47 you have the fix.

]]>https://forums.opera.com/post/91543https://forums.opera.com/post/91543Tue, 12 Jan 2016 12:49:49 GMT<![CDATA[Reply to Performance Issue on OS X El Capitan on Mon, 11 Jan 2016 09:17:52 GMT]]>Hi @xscratt, thanks to your help we've been able to fix this issue. The fix will be available in the next version of Opera Stable, which I expect to be released soon. You'll get the update automatically. Thanks again!

]]>https://forums.opera.com/post/91493https://forums.opera.com/post/91493Mon, 11 Jan 2016 09:17:52 GMT<![CDATA[Reply to Performance Issue on OS X El Capitan on Fri, 11 Dec 2015 08:32:44 GMT]]>Thanks for the reply, @avl!

I have a MacBook Pro Retina 13" mid 2014 (model: MGX92). It has only integrated Intel Iris 5100 video, and "About this Mac" tells about 1536 MB of RAM available for it. Other characteristics: CPU Intel Core i5-4308U @ 2.8 GHz (identified by MacCPUID), 8GB RAM, 512 GB SSD.

OS X version: 10.11.1 (15B42)

]]>https://forums.opera.com/post/89586https://forums.opera.com/post/89586Fri, 11 Dec 2015 08:32:44 GMT<![CDATA[Reply to Performance Issue on OS X El Capitan on Thu, 10 Dec 2015 13:47:49 GMT]]>Hi @xscratt, and thanks a lot for your detailed description, the difference between starting with / without transparency and making the change afterwards might lead to a fix indeed :). We've seen this problem reported before but it's not reproducible for everybody. Can you tell us which system you have, and in particular which GPU? This is listed in  -> About this Mac.

]]>https://forums.opera.com/post/89538https://forums.opera.com/post/89538Thu, 10 Dec 2015 13:47:49 GMT