While looping a for loop and pcall causes lag?

Hello so i've had this issue for a while now and i can't find any way to fix it. Heres the script:

LocalScript:

--Example

local function getProp(obj, prop)
    local getPropVar = obj[prop]
    return getPropVar
end
local protectedCall = pcall

while wait() do
    for i,v in next, game:GetDescendants() do
        local Transparency = protectedCall(function() getProp(v, "Transparency") end) --Im guessing pcall is the part that lags but im not sure

        if Transparency then
            Transparency = 1
        end
    end
end

The script works prefectly fine but it causes alot of lag. Try it out for yourself and if you find a fix that you would like to share, please tell me.

Any help is appreciated.