performance

type GetMetricsReply struct {
	Metrics []Metric `json:"metrics"` // Current values for run-time metrics.
}

type Metric struct {
	Name  string  `json:"name"`  // Metric name.
	Value float64 `json:"value"` // Metric value.
}

type MetricsClient interface {
	// Recv calls RecvMsg on rpcc.Stream, blocks until the event is
	// triggered, context canceled or connection closed.
	Recv() (*MetricsReply, error)
	rpcc.Stream
}

type MetricsReply struct {
	Metrics []Metric `json:"metrics"` // Current values of the metrics.
	Title   string   `json:"title"`   // Timestamp title.
}