Redstone lamps (and mobile glowstone or other lights), can affect much larger areas, especially if they are illuminating a complex landscape or build. Several redstone devices emit changeable light: Even switching a redstone torch can require updating the light levels for blocks up to 6 spaces away. Rapid changes in lighting are especially troublesome.Keeping redstone dust and other changeable blocks out of sight can be helpful. Large and complex redstone devices, especially those driven by fast clocks, can likewise make trouble.Farms that produce large amounts of animals or item entities can cause lag.While crop growth is not usually burdensome, for sufficiently large farms even plant growth can add up.Be careful about building large farms or other devices.Large numbers of item frames in view can cause lag.

If in multiplayer, move away from areas densely populated by players.

Particularly complex terrain like mountains or jungles can also be troublesome.

Try not to go to the Nether on lower-end PCs.

This means closing any browsers or other games.

If your computer is hot or your fan is loud, avoid running mods which add a lot of content and don't do anything that causes your computer to run a lot of calculations.

You cannot run both Starlight and Phosphor at once, so it is suggested to use Starlight. Phosphor may also be used in place of Starlight, although Starlight is several times faster than Phosphor. Either mod can be paired with Starlight and Lithium to speed up lighting updates and general game systems respectively. Note that Sodium only supports Minecraft 1.16+ with Fabric and can't be installed together with OptiFine, but provides significantly higher performance on most PCs.

Install OptiFine or Sodium to adjust settings to better suit your computers architecture.

Test both ideas and see which setting works best!

If your computer has a better graphics card, you might want to enable full screen, as this will make your GPU focus more on Minecraft and less on other programs.

Reduce the size of the game's window, as this makes the game render less, making the game run a little bit faster.

Note that this can result in water/lava drips not being visible, and thus taking a lava bath.

If the mouse cursor is lagging, change the mouse sensitivity to HYPERSPEED!!!.

Reduce Graphics from Fabulous! to Fancy or Fast.

Set Maximum FPS to Unlimited however, lower-mid end PCs will experience stutter.

Most of the following suggestions are configurable in the game's Options menu, accessible by pressing Esc. Note that the debug screen is known to cause more load to your system, resulting in lower FPS than you would normally achieve, so your FPS might increase as soon as you close the display.

The frame rate will be shown under the Minecraft version at the top left.

Animation frame rate addons