Enable option to toggle between array and object format

[slabasan]

Fixes #123

TODO:

• CTF format specifies valid values for displayTimeUnit as ms or ns. But in PFA, we are converting to microsec. Please check how the value of displayTimeUnit impacts the visualization in Perfetto (if at all). Then this is ready for merge.

Viewable in perfetto (without closing brackets):

{
  "displayTimeUnit": "us",
  "otherData": {

  },
  "traceEvents": [
    {"name": "foo", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174687410.2, "ph": "B"},
    {"name": "bar", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174689621.8, "ph": "B"},
    {"name": "bas", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174690776.0, "ph": "B"},
    {"name": "bas", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174690855.5, "ph": "E"},
    {"name": "bar", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174690925.0, "ph": "E"},
    {"name": "foo", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174690992.2, "ph": "E"},
    {"name": "foo", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174691069.5, "ph": "B"},
    {"name": "bar", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174692209.5, "ph": "B"},
    {"name": "bas", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174693350.2, "ph": "B"},
    {"name": "bas", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174693426.2, "ph": "E"},
    {"name": "bar", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174693492.8, "ph": "E"},
    {"name": "foo", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174693558.8, "ph": "E"},
    {"name": "foo", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174693634.5, "ph": "B"},
    {"name": "bar", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174694773.0, "ph": "B"},
    {"name": "bas", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174695913.5, "ph": "B"},
    {"name": "bas", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174695988.0, "ph": "E"},
    {"name": "bar", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174696054.5, "ph": "E"},
    {"name": "foo", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174696120.2, "ph": "E"},
    {"name": "foo", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174696195.2, "ph": "B"},
    {"name": "bar", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174697334.5, "ph": "B"},
    {"name": "bas", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174698474.8, "ph": "B"},
    {"name": "bas", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174698551.8, "ph": "E"},
    {"name": "bar", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174698618.5, "ph": "E"},
    {"name": "foo", "cat": "__main__", "pid": 74101, "tid": 74101, "ts": 1712616174698683.8, "ph": "E"},

[tpatki]

@alizalisan @loudsun1997

We'll merge after the following tests.

• Test in Perfetto and with displayTimeUnit
• Test with compact file format
• Test with cpu/mem usage to verify that works correctly

[alizalisan]

@tpatki

All tests are complete. This is ready to merge.

[tpatki]

Thanks! Merging.