`Tracing.start`

Start trace events collection.

Domain: Tracing stable

Parameters

Name	Type	Description
`categories` (optional)	`string`	Category/tag filter
`options` (optional)	`string`	Tracing options
`bufferUsageReportingInterval` (optional)	`number`	If set, the agent will issue bufferUsage events at this interval, specified in milliseconds
`transferMode` (optional)	`string`	Whether to report trace events as series of dataCollected events or to save trace to a stream (defaults to `ReportEvents`).
`streamFormat` (optional)	`StreamFormat`	Trace data format to use. This only applies when using `ReturnAsStream` transfer mode (defaults to `json`).
`streamCompression` (optional)	`StreamCompression`	Compression format to use. This only applies when using `ReturnAsStream` transfer mode (defaults to `none`)
`traceConfig` (optional)	`TraceConfig`
`perfettoConfig` (optional)	`string`	Base64-encoded serialized perfetto.protos.TraceConfig protobuf message When specified, the parameters `categories`, `options`, `traceConfig` are ignored. (Encoded as a base64 string when passed over JSON)
`tracingBackend` (optional)	`TracingBackend`	Backend type (defaults to `auto`)

{
  "id": 1,
  "method": "Tracing.start"
}

{
  "id": 1,
  "result": {}
}

const result = await send('Tracing.start');
console.log(result);