Cell attributes and buffered mode

Before version 2.20, array cell attributes were synchronized quite often by the runtime system, and this was not very efficient. As a result, there was not much difference between using buffered or unbuffered mode; when changing cell attributes, the result was immediate even in buffered mode.

Starting with version 2.20, it is recommended that you use the UNBUFFERED mode when setting cell attributes; otherwise, the colors will not be synchronized on the front-end.