Minetest-WorldEditAdditions/worldeditadditions/utils/lru_benchmark.lua

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local LRU = require("lru")
local operations = 100000
local values = {
"Abiu", "Açaí", "Acerola", "Ackee", "African cucumber", "Apple", "Apricot",
"Avocado", "Banana", "Bilberry", "Blackberry", "Blackcurrant",
"Black sapote", "Blueberry", "Boysenberry", "Breadfruit", "Cactus pear",
"Canistel", "Cempedak", "Cherimoya", "Cherry", "Chico fruit", "Cloudberry",
"Coco De Mer", "Coconut", "Crab apple", "Cranberry", "Currant", "Damson",
"Date", "Dragonfruit (or Pitaya)", "Durian", "Egg Fruit", "Elderberry",
"Feijoa", "Fig", "Finger Lime", "Goji berry", "Gooseberry", "Grape",
"Raisin", "Grapefruit", "Grewia asiatica", "Guava", "Hala Fruit",
"Honeyberry", "Huckleberry", "Jabuticaba", "Jackfruit", "Jambul",
"Japanese plum", "Jostaberry", "Jujube", "Juniper berry", "Kaffir Lime",
"Kiwano", "Kiwifruit", "Kumquat", "Lemon", "Lime", "Loganberry", "Longan",
"Loquat"
}
-- From http://lua-users.org/wiki/SimpleRound
function round(num, numDecimalPlaces)
local mult = 10^(numDecimalPlaces or 0)
return math.floor(num * mult + 0.5) / mult
end
--- Pads str to length len with char from right
-- @source https://snipplr.com/view/13092/strlpad--pad-string-to-the-left
local function str_padend(str, len, char)
if char == nil then char = ' ' end
return str .. string.rep(char, len - #str)
end
--- Pads str to length len with char from left
-- Adapted from the above
local function str_padstart(str, len, char)
if char == nil then char = ' ' end
return string.rep(char, len - #str) .. str
end
local values_count = #values
function test(size)
local cpu_start = os.clock()
local lru = LRU.new(size)
local hits = 0
local misses = 0
for i=1,operations do
local key = values[math.random(1, values_count)]
if math.random() >= 0.5 then
-- set
lru:set(key, math.random())
else
-- get
if lru:get(key) == nil then
misses = misses + 1
lru:set(key, math.random())
else
hits = hits + 1
end
end
end
local cpu_end = os.clock()
print(
size,
str_padend(tostring(round(cpu_end - cpu_start, 6)), 9),
hits, misses,
((hits/operations)*100)
)
end
io.stderr:write("OPERATIONS\t"..operations.."\n")
print("size", "cpu time", "hits", "misses", "hit ratio (%)")
for i=3,256 do
io.stderr:write("size "..i.."\r")
test(i)
end