How to create socket io rooms with node js child process

I am trying to create rooms with 5 members they are sharing the data between each and everyone with each 100ms frequently. when I deploy this logic with 20 rooms the CPU utilization goes from 70% to 80%. So I decided to run with this child process but I can't able to implement the child process with socket io. if anyone has an idea please help with this. Thanks

Client Script

socket = io("ws://localhost:52300", { transports: ["websocket"], reconnection: false });
socket.emit('joinRoom',{roomId:botsetId,player:player_id});

socket.on('updatePosition', function (data) {
        console.log(data);
    });

function updateData()
{
socket.emit('updatePosition', { "p": { "x": 0.5, "y": 0.357, "z": args.z }, "l": 20, "s": -0.01578048, "m": 6.809624, "a": 1, "c": 44.39658, "username": player_id,"roomId":socketRef[player_id].roomId });
}

Server Script

var multiplayer_server_port = (process.env.PORT || 52300)
var socket = require('socket.io')(multiplayer_server_port)

var app = require('express')();
var bodyParser = require('body-parser');
const { disconnect } = require('process');
var http = require('http').Server(app);
var port = 54500;

const {fork} = require("child_process") 

socket.on('connection',function(client){
    
    console.log('########-Making Connection With Client-########');

    const childProcess = fork('./updatePosition.js');
    childProcess.send({"number": parseInt(req.query.number)})
    childProcess.on("message", message => res.send(message))

    client.on('joinRoom',function(data){
        var roomId = 'SET_'+data.roomId;
        client.join(roomId);
        console.log('Player '+data.player+' Joined the room '+data.roomId);
        console.log(socket.sockets.adapter.rooms);
    });

    client.on('updatePosition',function(data){
        console.log(data);
        //client.broadcast.to('updatePosition',data);
        var roomId = 'SET_'+data.roomId;
        client.broadcast.to(roomId).emit('updatePosition',data);
    });
});