Hi there!
In order to fix the issue, it's important to figure out on which side the issue exists. Delay might happen due to inefficient client side code, network delays or due to server side delays. Do you own both the client script and the web app? If the delay is on the web app, we don't have control over it, it can't be fixed. Please contact me so we can discuss this in more details.
Thanks & BR,
Oshan