minetest/games/devtest/mods/benchmarks/init.lua
DS d4d4712361
Implement get_node with a get_node_raw (#14384)
Add /bench_bulk_get_node
Considerably improves the execution speed of core.get_node
2024-03-03 15:53:23 +01:00

157 lines
4.4 KiB
Lua
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-- 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,
})
local function get_positions_cube(ppos)
local pos_list = {}
local i = 1
for x=2,100 do
for y=2,100 do
for z=2,100 do
pos_list[i] = ppos:offset(x, y, z)
i = i + 1
end
end
end
return pos_list
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 = get_positions_cube(player:get_pos())
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,
})
minetest.register_chatcommand("bench_bulk_get_node", {
params = "",
description = "Benchmark: Bulk-get 99×99×99 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 = get_positions_cube(player:get_pos())
local function bench()
local start_time = minetest.get_us_time()
for i=1,#pos_list do
local n = minetest.get_node(pos_list[i])
-- Make sure the name lookup is never optimized away.
-- Table allocation might still be omitted. But only accessing
-- the name of a node is a common pattern anyways.
if n.name == "benchmarks:nonexistent_node" then
error("should never happen")
end
end
return minetest.get_us_time() - start_time
end
minetest.chat_send_player(name, "Benchmarking minetest.get_node. Warming up ...")
bench()
minetest.chat_send_player(name, "Warming up finished, now benchmarking ...")
local result_us = bench()
local msg = string.format("Benchmark results: minetest.get_node loop 1: %.2f ms",
result_us / 1000)
return true, msg
end,
})