To use OptiFine, simply install the mod to the Minecraft game client, and run the game as usual. OptiFine is a Minecraft optimization mod that enables the game to run faster with better graphics. The mod requires no configuration and increases the game's frames per second with the mod's default settings.
To install Minecraft mods for versions 1.8 and higher, download Minecraft Forge for the appropriate Minecraft version. Install Minecraft Forge, and run Minecraft. Locate the Mods folder within the Minecraft folder. Copy all dowloaded mods into the Mods folder. In the Minecraft Launcher, click Edit Profile, and select the "Forge" version of Minecraft to launch the game with the installed mods.
To fully optimize OptiFine, go to the Video Settings menu, and read the tooltips. The tooltips provide directions to accurately set values to maximize FPS. If OptiFine reduces Minecraft performance, reset video settings to default, and remove FPS limiters. Other problems that cause FPS drops are HD texture packs, conflicting mods and corrupted installations.
OptiFine minimizes lag spikes and sometimes doubles FPS for some users. The mod also stabilizes Minecraft's frame rate with each monitor's refresh rate for smoother gameplay. Other features of OptiFine include antialiasing, FPS control, configurable details and animations, improved grass and snow texture, and support for HD textures.