I have a figure showing that on different datasets, method 1 is x times faster than method 2. What is a good x axis label? I have many datasets(over 10000), and two data processing methods A and B. B takes only 1/2 to 1/5 time of A to run on them. I want to draw a graph showing on these datasets, how much B is faster than A.
I use the ratio of their running time.
E.g., on Set 1, A uses 30 sec, B uses 5 sec, and the ratio is 6x. On Set 2, A uses 180 sec, B uses 50 sec, the ratio is 3.6x.
Now I draw a distribution bar graph. The X axis is the ratio described above, the Y axis is the percentage of datasets with that ratio. So assume there is a bar at (X,Y) in the figure, it means &quot;There are Y% datasets on which A takes X times compared to B&quot;.
What is a good X label for this kind of graph? Do I just write &quot;Ratio of Running Time Between A and B&quot;?
There are several possibilities. The one you suggested is OKish, but I'd prefer a shorter form like

Running time ratio A/B

Another possibility is to denote by t(A) and t(B) the running times of the two data processing methods and label the axis as

t(A)/t(B)

Finally let me point out that the unit symbol for second is &quot;s&quot; not &quot;sec&quot; [SI Brochure], and that a ratio is just 6, 3.6 etc. without appending any multiplication symbol.