Huge memory usage when multiple bots are up

[fire7d]

Hey. I wanted to "stress-test" my server but I have problems with memory usage with around 50 bots. I want of course more but in current state node.js eating around 5gb of ram.

What can I do to lower the memory usage?

const mineflayer = require('mineflayer')
const { pathfinder, Movements } = require('mineflayer-pathfinder')
const { GoalNear, GoalBlock, GoalXZ, GoalY, GoalInvert, GoalFollow } = require('mineflayer-pathfinder').goals
const {
    StateTransition,
    BotStateMachine,
    EntityFilters,
    BehaviorFollowEntity,
    BehaviorLookAtEntity,
    BehaviorGetClosestEntity,
    NestedStateMachine } = require("mineflayer-statemachine");

var targetEntity;

const credentials = [
  { username: 'minefl1', password: undefined },
  { username: 'minefl2', password: undefined },
  { username: 'minefl3', password: undefined },
  { username: 'minefl4', password: undefined },
  { username: 'minefl5', password: undefined },
  { username: 'minefl6', password: undefined },
  { username: 'minefl7', password: undefined },
  { username: 'minefl8', password: undefined },
  { username: 'minefl9', password: undefined },
  { username: 'minefl10', password: undefined },
  { username: 'minefl11', password: undefined },
  { username: 'minefl12', password: undefined },
  { username: 'minefl13', password: undefined },
  { username: 'minefl14', password: undefined },
  { username: 'minefl15', password: undefined },
  { username: 'minefl16', password: undefined },
  { username: 'minefl17', password: undefined },
  { username: 'minefl18', password: undefined },
  { username: 'minefl19', password: undefined },
  { username: 'minefl20', password: undefined },
  { username: 'minefl21', password: undefined },
  { username: 'minefl22', password: undefined },
  { username: 'minefl23', password: undefined },
  { username: 'minefl24', password: undefined },
  { username: 'minefl25', password: undefined },
  { username: 'minefl26', password: undefined },
  { username: 'minefl27', password: undefined },
  { username: 'minefl28', password: undefined },
  { username: 'minefl29', password: undefined },
  { username: 'minefl30', password: undefined },
  { username: 'minefl31', password: undefined },
  { username: 'minefl32', password: undefined },
  { username: 'minefl33', password: undefined },
  { username: 'minefl34', password: undefined },
  { username: 'minefl35', password: undefined },
  { username: 'minefl36', password: undefined },
  { username: 'minefl37', password: undefined },
  { username: 'minefl38', password: undefined },
  { username: 'minefl39', password: undefined },
  { username: 'minefl40', password: undefined },
  { username: 'minefl41', password: undefined },
  { username: 'minefl42', password: undefined },
  { username: 'minefl43', password: undefined },
  { username: 'minefl44', password: undefined },
  { username: 'minefl45', password: undefined },
  { username: 'minefl46', password: undefined },
  { username: 'minefl47', password: undefined },
  { username: 'minefl48', password: undefined },
  { username: 'minefl49', password: undefined },
  { username: 'minefl50', password: undefined },
]

const bots = []
for (let i = 0; i < credentials.length; ++i) {
	console.log("Succesfully logged in at ")
  setTimeout(() => {
    createBot(credentials[i])
    if (i === credentials.length - 1) ready()
  }, i * 100)
}

function createBot ({ username, password }) {
  const bot = mineflayer.createBot({
    host: '@@@',
    port: @@@,
    username,
	password,
    version: "1.8.8"
  })

  bots.push(bot)
}

const targets = {};

function ready () {
	
var RANGE_GOAL = 1 // get within this radius of the player

  bots.forEach(bot => {
	  bot.loadPlugin(pathfinder)
      var mcData = require('minecraft-data')(bot.version)
	  var defaultMove = new Movements(bot, mcData)
	  bot.on('chat', (username, message) => {
			if (username === bot.username) return
			if (message !== 'come') return
			var target = bot.players[username].entity;
			
			var { x: playerX, y: playerY, z: playerZ } = target.position
			
			bot.pathfinder.setMovements(defaultMove)
			const playerCI = bot.players['xCoderPL1337']
			const goal = new GoalFollow(playerCI.entity, 1)
			bot.pathfinder.setGoal(goal, true)
			//bot.on('move',() => {
			//	bot.setControlState('jump', true);
			//})
	  })

  })
}

[u9g]

Using that many bots will cause high ram usage. They all have to keep track of the world individually, so it will take a lot of memory. To make them more performant, you can try using worker_threads, otherwise it’s not really doable.

[XfedeX]

You could try reducing view distance by using:

bot.settings.viewDistance = "tiny"

inside bot.once(spawn, function() { /* HERE */ })
EDIT: You also don't need to use {username: "minefl", password: undefined}, just use {username: "minefl"}

[u9g]

this does nothing