cl_maxpackets sets how many packets are sent to client (yourself).
/seta cl_maxpackets 100
Values: 15 to 100
If your cl_maxpackets are higher, more data is sent to you as the client and when these packets are smaller they arrive more frequently to you. If you see more data about your environment, you can decide more precise how or where to move.
Players on a low rate setting (usually players using a modem) should have their cl_maxpackets setting lower.
But, because the packets go both ways (to client and to the server), players on low maxpackets might have problems, because other players will find this player’s movements weird which can make them hard to shoot and also this player can see other players movement weird.