Firebase + Shared hosting speed up suggestions

I am working on the application which uses Firebase; and php on shared hosting. This application stores data on hosting and chat on firebase. I found the following issues

1. Accessing any data on firebase via PHP scripts hosted on server takes a lot of time. Login process itself took 3-4 mins.

2. What could i do to improve the access time, retrieving time? It's too slow. Even reading data takes time.