World switching

World switching, also known as world hopping exploits a side effect of the duplicate worlds within the RuneScape game.

Overview
Each RuneScape worlds is hosted on its own computer, known as a server. Servers are continuously connected to the internet, and receive tie-ins from connections of players all over the world. The servers host these players (up to 2000 on a single server) while they play RuneScape. To ease strain on the servers running RuneScape, Jagex created many different servers as to not overload a single server with too many players. Unlike many other MMORPGs, a single character can visit any of the worlds.

Players log into that server and are able to interact with all of the elements&mdash;monsters, buildings, and items&mdash;found on that world. These worlds, each located on its own server, are identical in form and yet independent of each other. Actions taken on world 1 will not affect the building, monsters, or items on world 2. For example, buying all of the chisels in the Lumbridge General Store on World 1 will not reduce the number of chisels in Lumbridge General Store on any other world. The side effect of these semi-duplicate worlds is if a store is overstocked or out of stock, or a mine is too busy or mined out for now, players can return to the world select screen and try a different world.

When a player stays in a particular location&mdash;such as a shop or ore spawn&mdash;while changing worlds, this is called world hopping.

Method
Players log out and and return to the world select screen and simply select a new world. When world switching, the servers typically make players wait approximately 30 seconds before switching over to prevent excessive world switching. Because of this delay, in some cases it is faster to wait for an item respawn than it is to switch.

Game effects
World switching can be very important in merchanting as prices often vary between worlds. This is noticeable in the fishing shop in Port Sarim, particularly with the prices of lobster and swordfish. Another type of merchanting is called vial hopping. It consists of buying out the stock of herblore potion vials in a particular shop then switching worlds and repeating the process.

World switching is also used to effectively mine runite ore, which, given the small number of rocks per world and a long respawn time, is very difficult to obtain at a decent rate without world switching.