How do I check a FiveM script's resmon?

resmon is a client-side view of what each resource costs the game each frame, so it must be read from inside a running client on the server you are testing — a server console cannot show it. The default sort is alphabetical; clicking the column header or watching for the resource you care about is enough for a single script. The value you want is the CPU time column in milliseconds, and it will fluctuate; watch it for thirty seconds rather than reading one frame.

Idle and active are different measurements and both matter. Idle is the resource's cost when its feature is not in use: stand still, close any menus, and read the number. Active is the cost while you exercise it — open the menu, run the job loop, trigger the interaction. A resource with a high idle cost is running per-frame work for nothing; a resource whose active cost never returns to idle after you stop is leaking a loop. Both are defects regardless of what the feature does.

The number is only meaningful with its conditions. Two people can read different resmon values for the same script because artifact version, framework, other running resources, player count, and hardware all change it. That is why a seller's claim should come with method and date, and why your own measurement should be recorded the same way: script version, artifact, framework, what else was running, and what you were doing. Measure on staging with a resource list that matches production; a bare server flatters everything.