1[
2  {"name": "a", "args": {},"pid": 52, "ts": 9524, "cat": "foo", "tid": 53,
3      "ph": "B"},
4  {"name": "a", "args": {},"pid": 52, "ts": 9560, "cat": "foo", "tid": 53,
5      "ph": "E"},
6  {"name": "b", "args": {},"pid": 52, "ts": 9629, "cat": "foo", "tid": 53,
7      "ph": "B"},
8  {"name": "b", "args": {},"pid": 52, "ts": 9631, "cat": "foo", "tid": 53,
9      "ph": "E"}
10]