040000 tree 463fc12cc2abe3e12b6f2fea2a9b8fa173d8f56d	binary_size
040000 tree eb49cdbba4bbd38033758d70a4b0bed4030e95bb	d3
040000 tree 7d67a3b8020b6cfa9fc2a770857fbaec41934abd	double-conversion