KB3038314 - Performance Issue when I use .InnerHTML

And your site would be...?

This is a Consumer-specific support forum. Developer-specific resources would include:

MSDN IE Development Forum (post such questions here instead)  

[http://social.msdn.microsoft.com/Forums/ie/en-US/home?forum=iewebdevelopment](http://social.msdn.microsoft.com/Forums/ie/en-US/home?forum=iewebdevelopment)

IE Extension Development Forum  

[https://social.msdn.microsoft.com/Forums/ie/en-US/home?forum=ieextensiondevelopment](https://social.msdn.microsoft.com/Forums/ie/en-US/home?forum=ieextensiondevelopment)

Tip: Include a link to your web-site or test pages (if possible) when posting in Developer forums.

IE Developer Resources  

[http://www.modern.ie/en-us](http://www.modern.ie/en-us) 

IE Developer Center - Key features by area  

[http://msdn.microsoft.com/en-US/ie/aa740473](http://msdn.microsoft.com/en-US/ie/aa740473)

IE11 Guide for Developers  

[http://msdn.microsoft.com/en-us/library/ie/bg182636(v=vs.85).aspx](http://msdn.microsoft.com/en-us/library/ie/bg182636%28v=vs.85%29.aspx)

its a extra net web based site, using html and .net.  question here is that site use .innerhtml and it causing performance issue due to this patch

Again, you should be posting **here** or here instead.

Chances are your site's coding is incompatible with KB3038314, not the other way around.

We are also facing this issue after installation of KB3038314. It had been working smoothly earlier on, and after the installation of this patch, rendering of a large HTML table by replacing innerHtml element drastically slows down. Uninstall the patch and things become normal as earlier once again.

My benchmarks on one of the older machines running IE8 shows that replacing an innerHtml element to render a table with 10000 rows took around 500ms without this patch and it's now taking around 80 seconds. We have tested it with IE8, IE9, IE10 and IE11, and it's producing across the board in all versions.

There are also multiple comments from people facing this issue on IEBlog: http://blogs.msdn.com/b/ie/archive/2015/04/14/april-2015-security-updates-for-internet-explorer.aspx but no replies from IEBlog itself.

I don't think it's a developer or coding issue because this is perfectly legal code. The fact that it was working fine before this patch, as well as, it's working fine with other browsers, is a further supporting point that this is not a coding issue.

Thus, this would appear to be a bug to me, introduced with this IE update, that slows down the rendering performance to the point of making it near unusable. It has also been reported here: https://connect.microsoft.com/IE/Feedback/Details/1271727 although there have been no replies from Microsoft so far.

Regards,

Shoaib.

We are also facing this issue after installation of KB3038314...

You will find appropriate support in the TechNet and/or MSDN forums.