 Wijmo Team Member | barrymac posted on November 6, 2012 at 10:15 am  Hi All, How does wijmo render charts in IE8 in the abscence of SVG support? Is it using VML ? I’ve come on to a project which is using wijmo for a dashboard with quite a few charts. It has very severe performance problems in IE8. I’m wondering what is a good step down approach for this platform? | |
 Wijmo Team Member | Richa posted on November 6, 2012 at 11:27 am Hello Barrymac, Our Wijmo charts are all powered by inline Scalable Vector Graphics (SVG) (http://wijmo.com/html5-charting-with-jquery-and-svg/). In case Wijmo charts are not working, try using non-minified version. Let me know in case your application doesnt work. Thanks, | Answer |
| Wijmo Team Member | barrymac posted on November 6, 2012 at 1:00 pm Hi Richa, Our application works but it’s very slow even on a high end workstation. IE8 doesn’t support SVG so I was thinking that Raphael.js is using VML to degrade for IE. http://en.wikipedia.org/wiki/Scalable_Vector_Graphics Would you have a stress test that I could try out perhaps? It could rule out the rendering in the case our code is the issue. Thanks, | Answer |
| Wijmo Team Member | Richa posted on November 7, 2012 at 7:22 am Hello Barry, We need a little more information on the type of charts you are using and what type of data are you using. Is the performance of the same application better on IE9/Chrome/Firefox? We need to reproduce the issue at our end first before we can suggest anything. A small sample of your application would be great. Thanks, | Answer |
| Wijmo Team Member | barrymac posted on November 9, 2012 at 10:55 am Hi Richa, Yes there’s a marked difference with IE8 specifically but we would like to improve the performance in general. Very kind of you to take a look at a sample for me. I’ve attached a zip file which should have everything needed to reproduce the issues. The things which appear to be taking the most time are the bar charts and switching tabs. There’s a lot of tables and these seem to take quite some time as well. Perhaps there’s some things we could avoid when using wijmo for grids ? In the attachment you can open the file server-free.html in the modules\mdpDashboard folder and that will bring everything else in. At the moment the javascript is broken into various scripts for the purposes of easier more modular development but we will probably inline and minify and compress all the javascript in production to reduce the server round trips. Thanks, | Answer |
| Wijmo Team Member | Richa posted on November 12, 2012 at 1:30 pm Hello Barry, I have escalated this case to the development team for further discussion. Thanks, | Answer |
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