add (temporary) hacky solution how to access sum of weights, by readi… #49

Job	Run time
bench (/cvmfs/sw.hsf.org/key4hep/setup.sh, prod)	5m 5s
bench (/cvmfs/sw-nightlies.hsf.org/key4hep/setup.sh, nightly)	10m 1s
	15m 6s

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