Very large HTTP request vs many small requests

Question

I need a 2D array (as Json) to be sent from server to client. It would be around 400x400 in size with each entry around 4 characters of text. So that makes it around 640KB o

Answer 1

Unless you are dealing with slow (very slow by today's standards) connections and really need incremental updates, do it in one request.

That gives you better efficiency for compressing the response, and avoids the overhead of the extra HTTP requests and response headers.