Performance improvements in Util.lua

[RocwoDev]

Here the performance test

function math.Timer()
    local timer = os.clock()
    return function()
        return (os.clock() - timer)
    end
end

local round1 = function(value, numDecimalPlaces)
	if numDecimalPlaces then
		local power = 10^numDecimalPlaces
		return math.floor((value * power) + 0.5) / (power)
	else
		return math.floor(value + 0.5)
	end
end

local round2 = function(num, numDecimalPlaces)
    return tonumber(string.format("%." .. (numDecimalPlaces or 0) .. "f", num))
end

local timer1 = math.Timer()
for i = 1, 1000000 do
     round1(1883.948364, 2)
end
print(timer1()) -- 0.077

local timer2 = math.Timer()
for i = 1, 1000000 do
     round2(1883.948364, 2)
end
print(timer2()) -- 1.176