Large Generated VXML file

Does the size of the dynamically generated VXML content play a role in whether the call recipient experiences a long delay when answering his/her call? I understand the factors as outlined in your knowledge articles that determines the delay, but, if my ASP.NET application that the starturl parameter points to generates “large” dynamic VXML content, how does the gateway know that this content is not ready to be played over the phone line? We are experiencing scenarios where the callee answers the phone and the message simply does not play at all and a “no input” event is raised. Thank you in advance

If you dynamically generate VXML files, the size normally does not matter. The gateway should fetch the first VXML file before making a call. In addition, if there is any Text to Speech item, the gateway will convert it to audio file first to save time. Basically, the gateway should fetch as much content as possible until there is a feedback expected.

After that point (callee makes a selection), the time to generate the next VXML file do matter.