```|Portada|Blog|Space|
```
```function test_range(n, times)
local arr, res = {}, {}
local times_res = {}
for i = 1, n do arr[i] = math.random() end
for t = 1, times do
local sum = 0
local t1 = os.clock()
for j = 1, 1000 do
for i = 1, n do
sum = sum + arr[i]
end
end
local t2 = os.clock() - t1
res[#res+1] = sum
times_res[#times_res+1] = 1e9 * t2 / n / 1000
end
return times_res, res
end

function test_ipairs(n, times)
local arr, res = {}, {}
local times_res = {}
for i = 1, n do arr[i] = math.random() end
for t = 1, times do
local sum = 0
local t1 = os.clock()
for j = 1, 1000 do
for i, v in ipairs(arr) do
sum = sum + v
end
end
local t2 = os.clock() - t1
res[#res+1] = sum
times_res[#times_res+1] = 1e9 * t2 / n / 1000
end
return times_res, res
end

function test_pairs(n, times)
local arr, res = {}, {}
local times_res = {}
for i = 1, n do arr[i] = math.random() end
for t = 1, times do
local sum = 0
local t1 = os.clock()
for j = 1, 1000 do
for i, v in pairs(arr) do
sum = sum + v
end
end
local t2 = os.clock() - t1
res[#res+1] = sum
times_res[#times_res+1] = 1e9 * t2 / n / 1000
end
return times_res, res
end

function stats(datas)
local res = {sum=0}
for k, v in ipairs(datas) do
if not res.min or v < res.min then res.min = v end
if not res.max or v > res.max then res.max = v end
res.sum = res.sum + v
end
res.avg = res.sum / #datas
return res
end

local st = stats(test_pairs(1000, 100))
print('time in ns/#t', st.min, st.avg, st.max)
```
```document.title="wiki: lua/micro-benchmarks/code"
```