Talk:Update 1.2/@comment-26530102-20170801143410/@comment-28905095-20170801191536

Deleting an old world has no effect on loading other worlds, unless your device has severe memory issues.

Loading a realm or server would usually have slightly less lag than large local worlds.

Finally, taking some time when starting up Minecraft, and just after opening a new world, could reduce some of the lag, but not all of it. This is due to world compaction being done every now and then, and this would also reduce the overall memory requirements for storing that particular world.