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2020-09-18Intelligently select extremities used in backfill.Erik Johnston3-19/+56
Instead of just using the most recent extremities let's pick the ones that will give us results that the pagination request cares about, i.e. pick extremities only if they have a smaller depth than the pagination token. This is useful when we fail to backfill an extremity, as we no longer get stuck requesting that same extremity repeatedly.
2020-09-161.19.2 v1.19.2