And using a simple for loop works ~10 times faster (see iterdpairs).
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- Code: Select all
local function do_test()
local t = {}
for i = 1,10000 do
t[i] = math.random(100)
end
local t0 = benchmark_function(function()
for _,i in ipairs(t) do
local v = i
end
end)
local t1 = benchmark_function(function()
for i = 1,#t do
local v = t[i]
end
end)
local t2 = benchmark_function(function()
for _,i in pairs(t) do
local v = i
end
end)
return {ipairs=t0, iterat=t1, pairs=t2, iterdpairs=t1/t2}
end
local function do_tests()
print(dump(do_test()))
print(dump(do_test()))
end
minetest.register_chatcommand("dot", {
func = do_tests
})
results:
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- Code: Select all
{
pairs = 8823.1911883084,
iterdpairs = 12.10008838753,
ipairs = 70913.929086071,
iterat = 106761.39323861
}
{
pairs = 8822.7044394013,
iterdpairs = 12.399933155525,
ipairs = 69546.978397662,
iterat = 109400.94529953
}
{
pairs = 8786.1178038755,
iterdpairs = 12.375191603071,
ipairs = 70601.752893865,
iterat = 108729.89127011
}
{
pairs = 8832.5981167857,
iterdpairs = 12.290935238273,
ipairs = 69513.548161937,
iterat = 108560.89143911
}
{
pairs = 15651.233929023,
iterdpairs = 6.8358941866598,
ipairs = 69837.185732664,
iterat = 106990.17902946
}
{
pairs = 16002.043941748,
iterdpairs = 6.6102360942443,
ipairs = 71695.749064878,
iterat = 105777.28844542
}
l use luajit of course.
The benchmark function from http://dev.minetest.net/Lua_Optimizatio ... nchmarking is omitted in the code.
