Profiler metrics:
{
    "spans": [
        {
            "id": 1,
            "name": "doZ1",
            "parentId": 0,
            "totalNanos": 9000000000,
            "netNanos": 6750000000,
            "exclusiveNanos": 2250000000,
            "count": 100
        },
        {
            "id": 2,
            "name": "doY1",
            "parentId": 1,
            "totalNanos": 3000000000,
            "netNanos": 2250000000,
            "exclusiveNanos": 1500000000,
            "count": 100
        },
        {
            "id": 3,
            "name": "doX",
            "parentId": 2,
            "totalNanos": 1000000000,
            "netNanos": 750000000,
            "exclusiveNanos": 750000000,
            "count": 100
        },
        {
            "id": 4,
            "name": "doY2",
            "parentId": 1,
            "totalNanos": 3000000000,
            "netNanos": 2250000000,
            "exclusiveNanos": 1500000000,
            "count": 100
        },
        {
            "id": 5,
            "name": "doX",
            "parentId": 4,
            "totalNanos": 1000000000,
            "netNanos": 750000000,
            "exclusiveNanos": 750000000,
            "count": 100
        },
        {
            "id": 6,
            "name": "doZ2",
            "parentId": 0,
            "totalNanos": 9000000000,
            "netNanos": 6750000000,
            "exclusiveNanos": 2250000000,
            "count": 100
        },
        {
            "id": 7,
            "name": "doY1",
            "parentId": 6,
            "totalNanos": 3000000000,
            "netNanos": 2250000000,
            "exclusiveNanos": 1500000000,
            "count": 100
        },
        {
            "id": 8,
            "name": "doX",
            "parentId": 7,
            "totalNanos": 1000000000,
            "netNanos": 750000000,
            "exclusiveNanos": 750000000,
            "count": 100
        },
        {
            "id": 9,
            "name": "doY2",
            "parentId": 6,
            "totalNanos": 3000000000,
            "netNanos": 2250000000,
            "exclusiveNanos": 1500000000,
            "count": 100
        },
        {
            "id": 10,
            "name": "doX",
            "parentId": 9,
            "totalNanos": 1000000000,
            "netNanos": 750000000,
            "exclusiveNanos": 750000000,
            "count": 100
        }
    ]
}
