Iron slowdown investigation
Iron has slowed down by 1.8% just by updating Iris from dev.2021-03-06.3.b0708b01
to dev.2021-06-03.0.2959900d
. I am not sure if we can do anything about that, but it would be good to at least figure out which changes caused the slowdown (though it looks like there at several, so this might be "death by a thousand cuts").