You should set up some fixed resource you can reference over and over again (a file or something in the target location). Then you record the current time (System.currentTimeMillis()) use a buffered input stream to the resource, read it fully, then record the time when done. Take the difference between start and stop.
Then do the same with a few of the other input streams.
Repeat multiple times, alternating between the BIS and other IS.
Average results and compare timing.