World pregen

Pre-generating a Minecraft world can help reduce the lag you may encounter when starting a new server, as world generation is one of the most common sources of lag in Minecraft.

If you would like to pre-generate your world, start your server up, then head to the World & Backups page. We recommend you only pre-generate your world when there are very few to no players online, as it can cause severe lag.

Once there, you should see a little blue button with a sapling icon.

Clicking this button will open up a popup which will allow you to select how many blocks in each direction you want to pre-generate using the slider, changing this will also update the estimate of how long it will take to finish pre-generating the chunks.