@hackage imj-measure-stdout0.1.0.2

The program helps you determine the maximum capacity of your stdout buffer.

It was initially developped to diagnose screen tearing issues in a terminal-based game I was developping, and more specifically, to see the effect of the following action :

hSetBuffering stdout $ BlockBuffering $ Just maxBound

Using this program, I found that, on my system, the previous call quadruples stdout's capacity, from 2048 to 8192 bytes.