Bug 199054

Right now when calculating a ratio for the summary page, we do the following: current = "last 24 hours of non-baseline data" if any data exists in the last 24 hours, otherwise "last available data point" baseline = "last 24 hours of baseline data" if any data exists in the last 24 hours, otherwise "last available data point" ratio = (median(current) / median(baseline)) Since we set the "last 24 hours" window to the current time, and it can take hours between a commit landing, build products becoming available, and testing to occur, this 24 hour window will always have a margin that contains no data to evaluate. Additionally, using only a single data point when no data is available in the past 24 hours can lead to misrepresented results due to a single outlier run before a configuration stopped producing results. I propose that we change the calculation to: current = "last 24 hours of non-baseline data since the last available data point" baseline = "last 24 hours of baseline data since the last available data point" ratio = (median(current) / median(baseline)) Overall, I think this should improve the analysis of data when representing results on Summary pages, since it will take more data points into account.