If you play on Hypixel, you need Patcher. While OptiFine fixes graphics, Patcher fixes the server-client bottleneck .
Common issues in vanilla 1.8.9 include:
The most effective way to boost performance is by installing individual mods, typically via the Forge mod loader. 1.8.9 fps boost mod
: This mod stops the game from rendering entities (players, mobs, chests) that you can't see through walls. In lobbies or crowded PvP games, this can significantly increase your frames. If you play on Hypixel, you need Patcher