Hello people watching the trending pages [0].

We have just merged a Change [1]
which affects how MRR tests work.
Instead of single trial of 10 second duration,
the test is now executing 10 trials of 1 second.

PAL is told to aggregate the results,
so in theory nothing should change,
but in practice the anomaly detection
could spot some regressions or progressions.

If the anomalies are big, we will revert.
If they are small (or none),
we will tell PAL (next week)
to take standard deviations into account,
which will definitely make anomaly detection
to mark many regressions and progressions
(just because it is not easy to have the detection
algorithm compatible with several trial durations at once).

After that, the anomaly detection should be able
to detect smaller regressions and progressions.
If it starts detecting more noise than signal,
we will revert (and try something else).

Vratko.

[0] https://docs.fd.io/csit/master/trending/introduction/dashboard.html
[1] https://gerrit.fd.io/r/14596
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