Bullet hitting a humanoid lagging the game badly

Help and Feedback Scripting Support
#1

Lags the game in 2 ways:
Server lag and Client lag ( tested on 3 computers, all of them lag when the player shoots somebody or you get shot, and the server lags aswell)

local caster = FastCast.new()


local castParams = RaycastParams.new()
castParams.FilterType = Enum.RaycastFilterType.Blacklist
castParams.IgnoreWater = true

local castBehavior = FastCast.newBehavior()
castBehavior.RaycastParams = castParams
castBehavior.Acceleration = Vector3.new(0, 0, 0)
castBehavior.AutoIgnoreContainer = false
castBehavior.CosmeticBulletContainer = bulletsFolder
castBehavior.CosmeticBulletTemplate = bulletTemplate

castParams.FilterDescendantsInstances = {IgnoreModule}

caster.LengthChanged:Connect(onLengthChanged)

caster.RayHit:Connect(function(cast, result, normal, bullet)
	local hit = result.Instance
	print("Hit"..hit.Name)
	local character = hit:FindFirstAncestorWhichIsA("Model")  
	bullet:Destroy()
	if character:FindFirstChild("Humanoid") and character.Humanoid.Parent.Name == script.Parent.Parent.Name then
		return
			
	else
		
		if character and character:FindFirstChild("Humanoid") and hit.Name == "Head" or hit.Name == "HeadCollision" then
			character.Health.bleeding.Value = true
			character.Health.BleedRate.Value = character.Health.BleedRate.Value - 35
			character.Health.Damage.Value = character.Health.Damage.Value + 35
			local HeadshotAnim = character.Humanoid:LoadAnimation(script.PainAnimations.Headshot)
			print("Headshot")
			local HitSound = script.Headshot:Clone()
			HitSound.Parent = hit
			bmod:damage(hit, "Knock", tool)
			HitSound:Play()
			HitSound.Ended:Connect(function()
				HitSound:Destroy()
			end)
			character.Humanoid.Health = character.Humanoid.Health - 90
			HeadshotAnim:Play()
			
			local Creator_Tag = Instance.new("ObjectValue")
			Creator_Tag.Name = "creator"
			Creator_Tag.Value = tool.Parent
			Creator_Tag.Parent = character.Humanoid

			
			local hitplayer = game.Players:GetPlayerFromCharacter(character)

			local shootingplayer = game.Players:GetPlayerFromCharacter(script.Parent.Parent)
			game.ReplicatedStorage.Material_Notify_Storage.MaterialEvent:FireClient(hitplayer, 1, "Error", "You've been shot in the ".."Head".." for 90 damage!", 5)
			bullet:Destroy()
			game.ReplicatedStorage.Material_Notify_Storage.MaterialEvent:FireClient(shootingplayer, 1, "Success", "You shot ".. character.Name .." in the Head for 90 damage.", 5)
			character.Health.bledout.Value = true
			character.Health.bledout.Value = false
			game:GetService("Debris"):AddItem(Creator_Tag, 5)
		else
		if character and character:FindFirstChild("Humanoid") and hit.Name ~= "Head" then
			character.Health.BleedRate.Value = character.Health.BleedRate.Value - tool.Variables.Damage.BleedRate.Value
			character.Health.bleeding.Value = true
				character.Health.Damage.Value = character.Health.Damage.Value + tool.Variables.Damage.BleedDmg.Value
				bmod:damage(hit, "Wound", tool)
				character.Health.bledout.Value = true
				character.Health.bledout.Value = false
			local HitSound = script.Bodyshot:Clone()
			HitSound.Parent = hit
			HitSound:Play()
			HitSound.Ended:Connect(function()
				HitSound:Destroy()
			end)
			bullet:Destroy()
			bullet.Orientation = Vector3.new(0,0,0)
				character.Humanoid.Health = character.Humanoid.Health - tool.Variables.Damage.Value
				
                local Creator_Tag = Instance.new("ObjectValue")
	            Creator_Tag.Name = "creator"
	            Creator_Tag.Value = tool.Parent
				Creator_Tag.Parent = character.Humanoid
				
				local hitplayer = game.Players:GetPlayerFromCharacter(character)
				
				local shootingplayer = game.Players:GetPlayerFromCharacter(script.Parent.Parent)
			if hit.Name == "HumanoidRootPart" then
			game.ReplicatedStorage.Material_Notify_Storage.MaterialEvent:FireClient(hitplayer, 1, "Error", "You've been shot in the UpperTorso for".." "..tool.Variables.Damage.Value.." ".."damage!", 5)
			else
			game.ReplicatedStorage.Material_Notify_Storage.MaterialEvent:FireClient(hitplayer, 1, "Error", "You've been shot in the".." "..hit.Name.." ".."for".." "..tool.Variables.Damage.Value.." ".."damage!", 5)
			end
			game.ReplicatedStorage.Material_Notify_Storage.MaterialEvent:FireClient(shootingplayer, 1, "Success", "You shot ".. character.Name .." in the ".. hit.Name .. " for ".. tool.Variables.Damage.Value.. " damage.", 5)
				bullet:Destroy()
				game:GetService("Debris"):AddItem(Creator_Tag, 5)
		end
		
		
		
		end
	end
	

	game:GetService("Debris"):AddItem(bullet, 2)
end)

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My gun system uses FastCast, but I need help, this is really game breaking and I am not able to release until I get this fixed. Super laggy, I didn’t record it tho. I tried deleting the blood, but it didn’t help so I honestly don’t know.

#2

Add a debounce to the rayHit so it can only execute once per hit (otherways it keeps firing that event when the bullet is still hitting the character)

local debounce;
caster.RayHit:Connect(function(cast, result, normal, bullet)
if debounce then return end
debounce = true
-- ... do your stuff
debounce = nil
end)
#3

My stuff’s working just fine and it doesn’t keep firing the event when the bullet is still hitting the character cause it gets immediately destroyed, but I need help with the immense lag.