I'm experiencing a performance issue on our DNN 7.1.2 instance.
We've got a site set up with multiple pages, of which one page contains a lot of modules, just over 50 on the one page.
When entering edit mode on the page with 50+ modules, the page hangs.
At first the page loads fine, but the loading hang when initializing the edit buttons for all modules. A dotted line is displayed for the edit buttons to be displayed in, but the buttons are not displayed yet.
Instead of the buttons appearing within 1-2 seconds (like on all other pages), the page keeps loading for around 25 seconds before the buttons appear. Some of the times, Chrome and Firefox display a "Unresponsive script" popup, asking if I want to kill the script.
The modules are all normal HTML modules, 50 of them containing only an html anchor with a small image (+= 10kb) inside.
Here's what I tried:
- I applied the Gravity skin instead of our custom skin, to exclude anything else as cause for this issue.
- other pages on the same site with less modules, load the edit mode within 1-2 seconds, so it's not a server performance issue.
- I tested in Chrome, Firefox and IE10, all are displaying the same behavior.
- I switched the Controlbar to Ribbonbar in the host settings because of known issues with the Controlbar performance. this made no difference
Is this a known issue, would there be anything I can try to get the performance to a more acceptable level?
Thanks in advance,