ParallelSpawn

ParallelSpawn.lua

local Bindable: BindableEvent = Instance.new("BindableEvent")

type Event = typeof(Bindable.Event)
local Event: Event = Bindable.Event

return function(_function: (...any) -> (), ...)
	if typeof(_function) ~= "function" then
		error("Must be a function", 2)
	end

	local connection: RBXScriptConnection = nil
	local argCount: number = select("#", ...)

	if argCount == 0 then
		connection = Event:ConnectParallel(_function)
	else
		local args: {[number]: any} = {...}
		connection = Event:ConnectParallel(function()
			_function(
				table.unpack(args, 1, argCount)
			)
		end)
	end

	Bindable:Fire()
	connection:Disconnect()
end

-- task.spawn/desyncronize solution:

-- This is way faster than using bindables.
-- This doesn't error, which can be useful to you if you just wanna *prepare* your game for it,
-- (AFAIK need to confirm) task.desyncronize doesn't error in live-games or studio,
-- It simply just makes it into parallel if it can be, or stays in the main thread if it can't.
-- Not erroring at all.

-- It is your choice which one you use, and for what.

local function RunFunctionInParallel(_function: (...any) -> (), ...)
	task.desynchronize()

	_function(...)
end

return function(_function: (...any) -> (), ...)
	if typeof(_function) ~= "function" then
		error("Must be a function", 2)
	end

	task.spawn(RunFunctionInParallel, _function, ...)
end