The one-question test
Look at the other players in your server. Are they teleporting, freezing, or rubber-banding too?
If yes — everyone is affected — this is server lag. It is not caused by your hardware and nothing in the optimization checklist fixes it, because the problem is not on your machine.
If no — you are the only one stuttering while everyone else moves smoothly — this is local: your PC, your Wi-Fi, or a setting on your end. That is the kind of lag the rest of this site addresses.
Why rubber-banding happens
Roblox predicts your movement locally so it feels instant, then corrects it once the server confirms your real position. Rubber-banding is that correction happening late and hard enough to see: you snap backward because the server's answer disagreed with what your screen already showed.
The gap between "you moved" and "the server agrees you moved" is ping. Above roughly 100ms, corrections start to feel visible. Packet loss above about 0.5% makes it worse, because your client is filling gaps with guesses that then need bigger corrections.
Why hits do not register
Combat games validate hits on the server, not on your screen, specifically so players cannot fake hits by editing their own client. By the time your click reaches the server, the target has already moved from where you saw them — often by less than a character-width, but enough to miss the hitbox check. This gets worse with higher ping on either side: yours, or theirs.
This is a deliberate trust boundary in how Roblox combat is built, not a setting you can turn off. Developers can tune how much the server tolerates before rejecting a hit, but a player cannot change that from their own machine.
Which games on this site stress the server hardest
Not every game creates server load the same way. Comparing max server size and genre across the games covered on this site shows three different patterns, not one:
Population-driven games allow the most players per server — up to 35 in Adopt Me, 28 in Brookhaven — and every additional player adds more character and prop state the server has to replicate to everyone else. More people in the server is directly more load.
Validation-driven games cap servers much smaller — 12 to 16 players — because the bottleneck is not population, it is combat. Every hit has to be checked server-side, so ping matters more than player count. Murder Mystery 2 is the extreme case: a single hit decides the round, so the delay between your action and the server's confirmation is the entire game.
Object-driven games run the smallest servers of all — 10 players in Pet Simulator 99, 8 in Grow a Garden 2 — because the load does not come from other players at all. It comes from how much each individual player has accumulated: pets, plants, decorations. A near-empty server can still lag if one player's collection is large.
Tower of Hell and +1 Speed Keyboard Escape have neither heavy combat validation nor large populations. Stutter in these two is much more often the local frame-pacing problem covered in their own guides than anything server-side.
What actually helps, if it is server lag
You cannot fix the server. You can remove yourself as part of the problem, and put yourself in the best position the network allows:
Wi-Fi adds variable delay that Ethernet does not. A background download or stream competing for the same connection adds more. Disabling Nagle's Algorithm — a Windows networking setting covered in the Check My Setup checklist — stops small game packets from being held and batched before sending, which measurably reduces effective ping in Roblox specifically.
None of this touches the server's own load. If a game's servers are overloaded — common right after a big update or during a spike in trending player counts — the fix has to come from the developer, not the player.
What actually helps, if it is local
If you are the only one affected, this is the FPS and stutter problem the rest of this site covers: Windows power settings, background apps, and graphics configuration. Run the full checklist at Check My Setup — it detects your hardware and orders the fixes by impact.