Since my time tests couldn't find any difference, does anyone have specific results of tests which show how much slower Vector actually is than ArrayList?

It would be good if I knew what the difference was so I knew how much weight to give the time in design considerations. Is the difference just fractions of a percent? . I was testing enough iterations that I think Iwould have found differences if they were several percent.

While I do believe that being synchronized has some overhead, it may be a trivial amount. Some people seem emphatic that Vector is bad and ArrayList is good, but without any specifics.