Feature/ifless loss #408

Job	Run time
build-docs (3.8)	5m 14s
build-mpi (3.9)	2m 19s
build-numpy (3.8, short)	2m 0s
build-mpi (3.10)	1m 54s
build-jax (3.8)	1m 26s
build-numpy (3.8, optimize)	5m 24s
build-torch (3.8)	2m 42s
build-jax (3.9)	1m 23s
build-numpy (3.8, multivariate)	2m 16s
build-torch (3.9)	3m 1s
build-jax (3.10)	1m 20s
build-numpy (3.8, optimize-experimental)	51s
build-torch (3.10)	3m 11s
build-numpy (3.9, short)	2m 19s
build-numpy (3.9, optimize)	6m 37s
build-numpy (3.9, multivariate)	2m 11s
build-numpy (3.9, optimize-experimental)	54s
build-numpy (3.10, short)	2m 18s
build-numpy (3.10, optimize)	6m 23s
build-numpy (3.10, multivariate)	2m 52s
build-numpy (3.10, optimize-experimental)	1m 12s
	57m 47s

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