Intersoft Community - WebTextEditor - High CPU usage on big html content

High CPU usage on big html content

yudi — Mon, 25 Jul 2016 07:27:41 GMT

Please find the sample in the attachment. I have added the required assembly files in the Bin folder.

Please feel free to let me know if you have different result.

High CPU usage on big html content

aliard@sigma-rh.com — Fri, 22 Jul 2016 20:02:20 GMT

Hi Yudi,

can you send me your sample application, I will do some test on my end.

Regards,

Alex

High CPU usage on big html content

yudi — Wed, 20 Jul 2016 02:59:01 GMT

I modified SaveAndLoadContentToFile.aspx sample file of WebTextEditor and load provided sample content by invoking LoadContentFromFile(string fileName, bool isCompleteHTML) method in button click event. Save the changes and view the page in Chrome 51 with CPU Profiling started.

I checked on the regex function in WebTextEditor_Helper.js in WebTextEditorConvertEngine.ConvertToXHTML, and found that it took 254.2 ms. I enclosed the CPU Profile (as attachment) for your reference.

The test was performed on: WebTextEditor 3 (3.0.1000.18); WebUI.NET Framework 3.0 (3.0.5000.975); and Chrome 51.

Please feel free to let me know if you find anything that I might miss during my attempt to reproduce the reported problem.

High CPU usage on big html content

aliard@sigma-rh.com — Thu, 14 Jul 2016 20:06:45 GMT

Hi,

We noticed a very high CPU usage when processing big html document with WebTextEditor.

We did a profiling with Chrome and we were able to target that the issue is a replace made with a regex in WebTextEditor_Helper.js in WebTextEditorConvertEngine.ConvertToXHTML.

You can try it with the HTML content I attached in a txt file. I also provided you the profiling session I used in Chrome, you will be able to see the stack where it takes more than 40 sec.

Regards,

Alex