NB! It seems this console command is not compatible with CS2.
Command Profile

CL_UPDATERATE

CS:GO

This command is used to set the number of packets per second of updates you request from the server.

Syntax
cl_updaterate [Packets p/second]

Description

This command is used to set the number of packets per second of updates you request from the server.

Syntax And Arguments

cl_updaterate [Packets p/second]
Packets p/second The number of packets you want to receive a second from the server. This can only be changed when you aren't playing, like when you are in the main menu for example.