reduce memory footprint in graph creation #5926

Job	Run time
checks / other-checks	35s
wheel-build-cugraph-equivariant / compute-matrix	2s
devcontainer / build (amd64, 12.5, conda)	5m 58s
checks / check-style	2m 10s
devcontainer / build (amd64, 12.5, pip)	5m 57s
wheel-build-cugraph-equivariant / 11.8.0, 3.10, amd64, rockylinux8	3m 6s
wheel-build-cugraph-equivariant / 12.5.1, 3.10, amd64, rockylinux8	3m 8s
wheel-build-cugraph-equivariant / 11.8.0, 3.11, amd64, rockylinux8	3m 14s
wheel-build-cugraph-equivariant / 12.5.1, 3.11, amd64, rockylinux8	3m 8s
wheel-build-cugraph-equivariant / 11.8.0, 3.10, arm64, rockylinux8	2m 35s
wheel-build-cugraph-equivariant / 12.5.1, 3.10, arm64, rockylinux8	2m 53s
wheel-build-cugraph-equivariant / 11.8.0, 3.11, arm64, rockylinux8	2m 40s
wheel-build-cugraph-equivariant / 12.5.1, 3.11, arm64, rockylinux8	2m 51s
conda-cpp-build	0s
wheel-build-pylibcugraph	0s
conda-cpp-tests	0s
conda-python-build	0s
conda-cpp-checks	0s
wheel-tests-pylibcugraph	0s
conda-python-tests	0s
docs-build	0s
conda-notebook-tests	0s
wheel-build-cugraph	0s
wheel-build-nx-cugraph	0s
wheel-tests-cugraph	0s
wheel-tests-nx-cugraph	0s
wheel-build-cugraph-dgl	0s
wheel-build-cugraph-pyg	0s
wheel-tests-cugraph-dgl	0s
wheel-tests-cugraph-pyg	0s
wheel-tests-cugraph-equivariant / compute-matrix	4s
wheel-tests-cugraph-equivariant / 12.5.1, 3.10, amd64, ubuntu22.04, v100, latest-driver, oldest-deps	1m 26s
pr-builder	1s
	39m 48s

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