Chunky interface meaning

In the book of application architecture design, which I'am reading, I've found the following statement:

"To reduce round trips and improve communication performance, de开发者_JS百科sign chunky interfaces."

Can anybody explain me what does "chunky interface" mean?

Basically, it refers to the amount of data transferred in one call. For example, if you wanted to get a set of data from a server, instead of asking

GetRecord(1);
GetRecord(2);
GetRecord(3);
GetRecord(4);

you'd design a batch method, like

GetRecords(1,4);

The idea is that the first design incurs four lots of overhead, but the second only one.

A chunky interface is one where you minimise the amount of separate calls whilst accomplishing a task by maximising the work done by each call.

Here's an overview of chunky interfaces.