Client-side tracing for performance analysis in production.

$ component install component/trace

Initialize a new Tracer with the given id and name. A "cycle" represents N related traces, these traces may be sequential or concurrent, later graphed to show you how long the cycle and its components spent processing.

Trace start of type with optional date.

Trace end of type with optional date.

Return all cycles collected thus far, flushing them for subsequent calls. This method allows you to report the cycles to the server periodicially, you'll likely want to also transmit user-agent data along with this.

var cycle = require('trace');
cycle.flush();

Yields an array similar to the following with your trace data:

[
  {
    "id": 1,
    "cycle": "upload",
    "type": "upload",
    "start": 1366405821464
  },
  {
    "id": 1,
    "cycle": "upload",
    "type": "thumb",
    "start": 1366405822465
  },
  {
    "id": 1,
    "cycle": "upload",
    "type": "thumb",
    "end": 1366405822766
  },
  {
    "id": 1,
    "cycle": "upload",
    "type": "upload",
    "end": 1366405823268
  }
]

MIT