Aron Jansen

Ok, that's no problem. But if the stopping logic stays in the existing `Stopping` class but all the chi2 computations etc are moved into metrics, that should be fine right?...

Just for my future self as it will probably be a week or more before I continue this: - Make sure all the callbacks are working, need to test >100...

The bulk of the work is done, and I've tested that the speedup is indeed about 33% (tested with 1 replica on CPU with NNPDF40_nnlo_as_01180_1000.yml, but it should be the...

Good question, I haven't tested as much but it seems point 1 by itself actually slows it down by a factor of 2, for a single replica. Points 3 and...