That's why it's confusing: "2x speedup" would clearly indicate 200% of the current speed, so 97% speedup is unclear if it's a multiple (not because that would be a slow down), a reduction in time (which was my assumption) or an increase in speed (something per unit of time).
I guess you are right and it's probably the latter, but obviously better language would have avoided any doubt.
I guess you are right and it's probably the latter, but obviously better language would have avoided any doubt.