Hi @bigwoof91 
, sorry for the delay in response! We’ve looked into this. In your HAR file we see only your slow SSR function. This is not meant to be cached so it run every time. Your function does runs reliably somewhere between 500ms and 3.5s.
My only action item for you here is to debug your function using the info in [Support Guide] Why is my function timing out? This should help speed it up.
I hope this helps! Happy building 