Hi,
We are running Apex 24.2, and we have widely used the Modal Dialog for better responsiveness in different devices.
However, we observe it takes about 5 seconds to load a blank dialog itself (without any server calls) and verified the network traffic but could not figure out where is the latency.
Have someone experienced the same and applied any solution that could be shared with me?
Sharing my observations below:
Initial page load when user clicks on a menu item:

The actual page process happens few seconds of inactivity

Attaching the HAR file to show the network activity
apex_modal_dialog_PT2.har
Regards,
Mohammed Sadiq