squishyball

squishyball is a simple command-line utility for performing double-blind A/B, A/B/X or X/X/Y testing on the command line. The user specifies two input files to be compared and uses the keyboard during playback to flip between the randomized samples to perform on-the-fly compar‐ isons. After a predetermined number of trials, squishyball prints the trial results to stdout and exits. Results (stdout) may be redirected to a file without affecting interactive use of the terminal. squishyball can also be used to perform casual, non-randomized comparisons of groups of up to ten samples; this is the default mode of operation.