Formerly known as 'notify-plugin-call', it is now named 'experimental-notify-plugin-call'. This change may seem small or insignificant but it actually makes a lot of sense, especially when you consider that the way the run time is currently determined and communicated is almost certain to change in future releases. This change will also mean a new version of the PW extension as it needs to be adjusted to the new topic, but the new version will also incorporate some improvements to the UI as well.
A number of people have also noted that in the performance test charts I have posted recently, the y-axis does not start at 0. Admittedly this was a bit of an oversight on my part, especially since when you do have the y-axis start at 0 my case for PW becomes much easier to make. I have therefore recreated the chart for the two tests I posted earlier - this time with the y-axis properly labeled: