Question

I’m creating an application that will tell a user how far away a large number of points are from their current position.

Each point has a longitude and latitude.

I’ve read over this article
http://www.movable-type.co.uk/scripts/latlong.html

and seen this post
Calculate distance in meters when you know longitude and latitude in java

There are a number of calculations (50-200) that need carried about.

If speed is more important than the accuracy of these calculations, which one is best?

Answer 1

this is O(n)
Dont worry about performance. unless every single calculation takes too long (which it isnt).