040000 tree 54d75204cbff5734d3f304613e99c8378f5da5ed	fast
040000 tree 4c542d602893a32658139db35a8a39fa80c55234	install_script
040000 tree 6a30b0733d57222d45f94c17c16cc2d969debb82	installation
040000 tree 0f6be2676fca29113a7c9a6ccc62de1d23827f0b	slow
040000 tree 8a0e18d1807fd5d7b9bcf3f035a3a45cfc64d537	sourcing