luau/bench/micro_tests/test_LargeTableSum_loop_index.lua

local function prequire(name) local success, result = pcall(require, name); return if success then result else nil end
local bench = script and require(script.Parent.bench_support) or prequire("bench_support") or require("../bench_support")

function test()

    local t = {}

    for i=1,1000000 do t[i] = i end

    local ts0 = os.clock()
    local sum = 0
    for i=1,#t do sum = sum + t[i] end
    local ts1 = os.clock()

    return ts1-ts0
end

bench.runCode(test, "LargeTableSum: for i=1,#t")