@twilio/voice-sdk/lib/twilio/preflight/timing.ts

Twilio's JavaScript Voice SDK

/**
 * Timing measurements that provides operational milestones.
 */
export interface TimeMeasurement {
  /**
   * Number milliseconds elapsed for this measurement
   */
  duration?: number;

  /**
   * A millisecond timestamp the represents the end of a process
   */
  end?: number;

  /**
   * A millisecond timestamp the represents the start of a process
   */
  start: number;
}

/**
 * Represents network related time measurements.
 */
export interface NetworkTiming {
  /**
   * Measurements for establishing DTLS connection.
   * This is measured from RTCDtlsTransport `connecting` to `connected` state.
   * See [RTCDtlsTransport state](https://developer.mozilla.org/en-US/docs/Web/API/RTCDtlsTransport/state).
   */
  dtls?: TimeMeasurement;

  /**
   * Measurements for establishing ICE connection.
   * This is measured from ICE connection `checking` to `connected` state.
   * See [RTCPeerConnection.iceConnectionState](https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/iceConnectionState).
   */
  ice?: TimeMeasurement;

  /**
   * Measurements for establishing a PeerConnection.
   * This is measured from PeerConnection `connecting` to `connected` state.
   * See [RTCPeerConnection.connectionState](https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/connectionState).
   */
  peerConnection?: TimeMeasurement;

  /**
   * Measurements for establishing Signaling connection.
   * This is measured from initiating a connection using `device.connect()`,
   * up to when [RTCPeerConnection.signalingState](https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/signalingState)
   * transitions to `stable` state.
   */
  signaling?: TimeMeasurement;
}