This reads like complete nonsense. If HTTP is involved, lets just give up and make the system as slow as possible?
The HTTP request needs to actually be actioned by the server before it can respond. Reducing the time it takes for the server to do the thing (accessing files) will meaningfully improve overall performance.
Switching out to JSON will meaningfully degrade performance. For no benefit.
The HTTP request needs to actually be actioned by the server before it can respond. Reducing the time it takes for the server to do the thing (accessing files) will meaningfully improve overall performance.
Switching out to JSON will meaningfully degrade performance. For no benefit.