local enable_log = false --- SET TO true TO LOG LAG VALUES EVERY MINUTE
local lag = 0
local am = 0
local minute = os.time() + 60
local lastval = 0.2
local highval = 0
local lasthigh = "?"

minetest.register_globalstep(function(dtime)

lag = lag + dtime
am = am + 1

if dtime > 0.5 then
highval = highval + 1
end

if os.time() >= minute then

lastval = lag/am
local lagf = ("%.2f"):format(lastval)

if enable_log == true then
minetest.log("action","AVG LAG: "..lagf.." ("..highval.."/"..am.." ticks critical)")
end

lasthigh = highval
lag = 0
am = 0
minute = os.time() + 60
highval = 0


end

end)

minetest.register_chatcommand("lag", {
func = function(name, param)
local avglag = ("%.2f"):format(lastval)
return true,"Average server lag: "..avglag.." seconds ("..lasthigh.." critical server ticks)."
end,
})