[Freeswitch-users] Speak vs. StreamFile

Hello, I am working on optimizing call flow code. I use Cepstral as TTS from FS managed module (C# .net code). I suspect using Session.Speak is slowing down the call experience (prompt delay) when there are # of concurrent calls. My question: does it help with performance if I create WAV file for each static prompt in advance and use Session.StreamFile instead of Session.Speak? Any help is appreciated. Malay