find_nodes_in_area.lua

-- Based on https://gitea.your-land.de/your-land/bugtracker/issues/3723 (Thanks to Alias/Bastrabun)
-- detect slow find_nodes_in_area calls
local old_find_nodes_in_area = core.find_nodes_in_area
local most_called = {}
core.find_nodes_in_area = function(pos1, pos2, nodenames, grouped)
    local from = debug.getinfo(2, "nS")
    local t0 = core.get_us_time()
    local ret, ret2 = old_find_nodes_in_area(pos1, pos2, nodenames, grouped)
    local t1 = core.get_us_time()
    local spos = core.pos_to_string(vector.round(pos1)) or ""
    local source = from.source or "unknown"
    local line = from.linedefined or "unknown"
    local time = (t1-t0)/1000
    local s = source .. "@" .. line
    most_called[s] = (most_called[s] or 0) + 1
    local logme = table.concat({"[DEBUG] FNIA time=",time,"ms at ",spos," from=",source,"@",line})
    core.log("action",logme)
    return ret, ret2
end

minetest.register_chatcommand("fnia", {
	privs = {interact = true},
	func = function(name)
		print(dump(most_called))
	end
})