Chrome DevTools Protocol

Stop trace events collection.

Start trace events collection.

categories: string

Category/tag filter

ExperimentalDeprecated
options: string

Tracing options

ExperimentalDeprecated
bufferUsageReportingInterval: number

If set, the agent will issue bufferUsage events at this interval, specified in milliseconds

Experimental
transferMode: string

Whether to report trace events as series of dataCollected events or to save trace to a stream (defaults to ReportEvents).

Allowed Values: ReportEvents, ReturnAsStream
streamFormat: StreamFormat

Trace data format to use. This only applies when using ReturnAsStream transfer mode (defaults to json).
streamCompression: StreamCompression

Compression format to use. This only applies when using ReturnAsStream transfer mode (defaults to none)

Experimental
traceConfig: TraceConfig
perfettoConfig: 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)

Experimental
tracingBackend: TracingBackend

Backend type (defaults to auto)

Experimental

Signals that tracing is stopped and there is no trace buffers pending flush, all data were delivered via dataCollected events.

dataLossOccurred: boolean

Indicates whether some trace data is known to have been lost, e.g. because the trace ring buffer wrapped around.
stream: IO.StreamHandle

A handle of the stream that holds resulting trace data.
traceFormat: StreamFormat

Trace data format of returned stream.
streamCompression: StreamCompression

Compression format of returned stream.

Type: object

recordMode: string

Controls how the trace buffer stores data.

Allowed Values: recordUntilFull, recordContinuously, recordAsMuchAsPossible, echoToConsole

Experimental
traceBufferSizeInKb: number

Size of the trace buffer in kilobytes. If not specified or zero is passed, a default value of 200 MB would be used.

Experimental
enableSampling: boolean

Turns on JavaScript stack sampling.

Experimental
enableSystrace: boolean

Turns on system tracing.

Experimental
enableArgumentFilter: boolean

Turns on argument filter.

Experimental
includedCategories: array[ string ]

Included category filters.
excludedCategories: array[ string ]

Excluded category filters.
syntheticDelays: array[ string ]

Configuration to synthesize the delays in tracing.

Experimental
memoryDumpConfig: MemoryDumpConfig

Configuration for memory dump triggers. Used only when "memory-infra" category is enabled.

Experimental

Tracing Domain