Seems to save some allocations and thus recover some performance
compared to the two separate folds we had before.
Change-Id: Ie3d283103e6a9b8aa702db633d9c988fda1b2903
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4348
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>