Run the test above for at least 60 seconds. Here is what each
number means for this game specifically.
What you see in game, and which number on this page explains it.
FiveM does not tune GTA Online's networking - it replaces it. OneSync moves entity ownership to the server and lifts the original 32-player limit far past it, with Infinity supporting well over a hundred players on a single roleplay server. Everything that follows from that is configured per server in server.cfg: the mode, the tick rate, whether NPC population is synchronised at all, and how far away the server stops sending you updates about vehicles and objects.
That last setting is the one players feel without knowing its name. OneSync culls distant entities, sending you state only for things within a few hundred game units. It is the reason a busy server can be flawless in the countryside and fall apart in the middle of Los Santos: the countryside has almost nothing to synchronise and the city has everything, and the transition happens as you drive.
For diagnosis this changes the usual rule. On most games, two servers behaving differently on the same connection points at routing. On FiveM it points at configuration, and it is a legitimate question to put to a server's staff: which OneSync mode are you running, and what are your population and culling settings? A server running a legacy mode with aggressive population sync will desync under load no matter how good every player's connection is.
What stays yours is the same as everywhere: loss and jitter on your own line. Roleplay sessions run for hours with constant traffic, so a connection that drops a burst every few minutes will break immersion repeatedly - and unlike a round-based game, there is no natural point at which the damage resets.
If the chart above shows packet loss or high jitter, work through
these in order.
What is OneSync and why does it matter for lag?
OneSync is FiveM's replacement for GTA's original networking. It moves entity ownership to the server and lifts the 32-player limit, but it also means the server decides what state you receive and how far away it stops sending it.
Why is one FiveM server smooth and another not?
Because tick rate, OneSync mode, culling distances and population settings are all configured per server. Your connection is the same; the configuration is not.
Why do vehicles teleport in FiveM?
Lost or late position updates for a server-owned entity. The server keeps simulating from its last known state, and your client corrects in one jump when the next update arrives.
Does my ping depend on the RP server's location?
Almost entirely. Most roleplay servers are hosted in one country, so a high ping usually means distance. This chart shows what your line reaches to a nearby server as a reference point.