[Geolocation] watchPosition callback has very unpredictable frequency

I am building an app that updates the distance from current location, but for some reason I am not getting a consistent callback frequency for navigator.geolocation.watchPosition It seems like something reseting the watch. My code has only componentWillUnmount where it would reset, but I put Alert it never occurred.

Is there frequency parameter I can specify or I guess I am thinking to go with manual timeout approach.

componentDidMount(){
    AsyncStorage.getItem('listings')
      .then((value) => {
        this.state.listings = value?JSON.parse(value):[];
        this.state.passProps.listings = this.state.listings;
        this.redrawListings();
        this.startWatch();
      })
      .done();
  }

  componentWillUnmount(){
    navigator.geolocation.clearWatch(this.watchID);
  }
startWatch(){
    this.watchID = navigator.geolocation.watchPosition((lastPosition) => {
      this.curLat = lastPosition.coords.latitude;
      this.curLon = lastPosition.coords.longitude;
      this._updateDistances();
    },
    (error) => AlertIOS.alert(error),
    {enableHighAccuracy: true, timeout: 0, maximumAge: 1000});
  }

[yonahforst]

@christopherdro I’ve upgraded to rn 0.20.0-rc1 which should include your update, right? I’m still experiencing a similar issue, where I only get location updates once every ~25 seconds. Even using the following options: {enableHighAccuracy: true, distanceFilter: 1, timeout: 1000}

[lsei]

I’m using the following options for watchPosition and have managed to get pretty frequent updates in iOS Simulator and built onto my iPhone (RN 0.42.3):

{
    enableHighAccuracy: true,
    distanceFilter: 1,
}