Optimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone

I'm currently using CoreLocation + CLLocationManager in order to compare a users current location to N amount of other locations. The problem I'm facing is I'm dealing with urban areas where locations are close to each other, so I need to pin point the location of the user as accurately as the device allows without sacrificing too much time. My calculations are darn accurate, the problem is, it takes far too long to collect 10 samples. I'll paste my filters/accuracy respective code below. If anyone can comment on how I can speed this up, that would be great. Until I speed it up, it's rather useless in my app as it currently takes around 3-4 minutes to gather info, a duration that's not accept by my target demographic.

Code looks something like this:

[self.locationManager setDistanceFilter:kCLDistanceFilterNone];

[self.locationManager setDesiredAccuracy:kCLLocationAccuracyBest];



- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation

{

    if (newLocation.horizontalAccuracy > 0.0f &&

                newLocation.horizontalAccuracy < 120.0f) { // roughly an accuracy of 120 meters, we can adjust this.



        [myLocs addObject:newLocation];

}

Thanks for any optimization tricks to speed this up.

Source: Tips4all