1 files changed, 117 insertions, 0 deletions
diff --git a/games/devtest/mods/benchmarks/init.lua b/games/devtest/mods/benchmarks/init.lua
new file mode 100644
index 000000000..19ba044a4
--- /dev/null
+++ b/games/devtest/mods/benchmarks/init.lua
@@ -0,0 +1,117 @@
+-- Safeguard against too much optimization. This way the results cannot be optimized
+-- away, but they can be garbage collected (due to __mode = "k").
+_G._bench_content_ids_data = setmetatable({}, {__mode = "k"})
+
+local function bench_name2content()
+	local t = {}
+	_G._bench_content_ids_data[t] = true
+
+	local get_content_id = minetest.get_content_id
+
+	local start = minetest.get_us_time()
+
+	for i = 1, 200 do
+		for name in pairs(minetest.registered_nodes) do
+			t[#t + 1] = get_content_id(name)
+		end
+	end
+
+	local finish = minetest.get_us_time()
+
+	return (finish - start) / 1000
+end
+
+local function bench_content2name()
+	local t = {}
+	_G._bench_content_ids_data[t] = true
+
+	-- Try to estimate the highest content ID that's used
+	-- (not accurate but good enough for this test)
+	local n = 0
+	for _ in pairs(minetest.registered_nodes) do
+		n = n + 1
+	end
+
+	local get_name_from_content_id = minetest.get_name_from_content_id
+
+	local start = minetest.get_us_time()
+
+	for i = 1, 200 do
+		for j = 0, n do
+			t[#t + 1] = get_name_from_content_id(j)
+		end
+	end
+
+	local finish = minetest.get_us_time()
+
+	return (finish - start) / 1000
+end
+
+minetest.register_chatcommand("bench_name2content", {
+	params = "",
+	description = "Benchmark: Conversion from node names to content IDs",
+	func = function(name, param)
+		minetest.chat_send_player(name, "Benchmarking minetest.get_content_id. Warming up ...")
+		bench_name2content()
+		minetest.chat_send_player(name, "Warming up finished, now benchmarking ...")
+		local time = bench_name2content()
+		return true, ("Time: %.2f ms"):format(time)
+	end,
+})
+
+minetest.register_chatcommand("bench_content2name", {
+	params = "",
+	description = "Benchmark: Conversion from content IDs to node names",
+	func = function(name, param)
+		minetest.chat_send_player(name, "Benchmarking minetest.get_name_from_content_id. Warming up ...")
+		bench_content2name()
+		minetest.chat_send_player(name, "Warming up finished, now benchmarking ...")
+		local time = bench_content2name()
+		return true, ("Time: %.2f ms"):format(time)
+	end,
+})
+
+minetest.register_chatcommand("bench_bulk_set_node", {
+	params = "",
+	description = "Benchmark: Bulk-set 99×99×99 stone nodes",
+	func = function(name, param)
+		local player = minetest.get_player_by_name(name)
+		if not player then
+			return false, "No player."
+		end
+		local pos_list = {}
+		local ppos = player:get_pos()
+		local i = 1
+		for x=2,100 do
+			for y=2,100 do
+				for z=2,100 do
+					pos_list[i] = {x=ppos.x + x,y = ppos.y + y,z = ppos.z + z}
+					i = i + 1
+				end
+			end
+		end
+
+		minetest.chat_send_player(name, "Benchmarking minetest.bulk_set_node. Warming up ...");
+
+		-- warm up with stone to prevent having different callbacks
+		-- due to different node topology
+		minetest.bulk_set_node(pos_list, {name = "mapgen_stone"})
+
+		minetest.chat_send_player(name, "Warming up finished, now benchmarking ...");
+
+		local start_time = minetest.get_us_time()
+		for i=1,#pos_list do
+			minetest.set_node(pos_list[i], {name = "mapgen_stone"})
+		end
+		local middle_time = minetest.get_us_time()
+		minetest.bulk_set_node(pos_list, {name = "mapgen_stone"})
+		local end_time = minetest.get_us_time()
+		local msg = string.format("Benchmark results: minetest.set_node loop: %.2f ms; minetest.bulk_set_node: %.2f ms",
+			((middle_time - start_time)) / 1000,
+			((end_time - middle_time)) / 1000
+		)
+		return true, msg
+	end,
+})
+
+