Part Lag Test 2026

Warning: Currently, sphere stress tests are broken, and we don't recommend testing with them. ⚠ GUIs on phones or tablets may be incorrectly scaled ⚠ Welcome to Part Lag Test 2026 (originally 2025)! Once you join the game, you can select which shape you want to lag test with, (part, sphere, or cylinder) and then the stress test will begin. The game will spawn blocks indefinitely until your game crashes. Even if an active server has been ongoing, do not worry. All the code in our game is client-sided so once you rejoin or join an already big server, your counter gets reset and everything restarts.