print duration statistics from pytest-repeat runs

[alexeyqu]

I asked this question in pytest core repo: pytest-dev/pytest#9433
They suggested coming here in case this would be a useful feature within pytest-benchmark.
What do you think?
As always, happy to implement.

What's the problem this feature will solve?

I want to do heavy benchmarking of my pytest tests -- running them multiple times and getting average/mean statistics for the runs.
Something like pytest tests/integration/ --durations=0 --count=100.
Currently the report outputs test durations for each test separately, e.g.:

37.85s call     tests/test.py::test[arg-3-5]
36.87s call     tests/test.py::test[arg-1-5]
36.29s call     tests/test.py::test[arg-2-5]
36.12s call     tests/test.py::test[arg-4-5]
. . .

It clutters the output and makes it harder to catch outliers.

Describe the solution you'd like

I'd like to have some flag (possibly, owned by pytest-repeat) that would command to merge stats for the repeated runs durations and output them in a structured way, e.g.

37s avg, 2s dispersion call     tests/test.py::test1[arg]
12s avg, 10s dispersion call     tests/test.py::test2[arg]
. . .

Ultimately, this would help when more precise analysis of test durations.

Alternative Solutions

I looked at pytest-benchmark but apparently it solves another problem of benchmarking a particular function/fixture.

Or maybe my googling skills have deteriorated...

Any comments are appreciated!

If we decide this functionality is indeed useful, I'm happy to implement.