# cpu var (world)

Source: https://ref.dm-lang.org/world/var/cpu

This is the percentage of a server tick that the server spends processing running procs and the work of sending map information to players. A value of 0 would indicate very little cpu usage. A value of 100 would indicate full cpu usage, which could mean that the server cannot complete all the necessary computations during a tick to finish in time for the next tick. In this case, timed events (such as sleep) may take longer than requested.

When deciding on a value for tick_lag, one could use this value to determine if the CPU is fast enough to tick at a higher rate.

The `map_cpu` var is a subset of this, measuring only time used for sending map information.

### See also
- [map_cpu var (world)](https://ref.dm-lang.org/world/var/map_cpu.md)
- [tick_lag var (world)](https://ref.dm-lang.org/world/var/tick_lag.md)
- [tick_usage var (world)](https://ref.dm-lang.org/world/var/tick_usage.md)
- [Tick proc (world)](https://ref.dm-lang.org/world/proc/Tick.md)