luau/bench/tests/shootout/heapsort.lua
Vyacheslav Egorov aafea36235
Fixed the backwards compatible benchmark support library require (#1125)
Previous benchmark require fix wasn't actually working correctly for the
old style require (or running in Lua).
2023-12-04 12:48:31 -08:00

80 lines
2.4 KiB
Lua

--[[
MIT License
Copyright (c) 2017 Gabriel de Quadros Ligneul
Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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]]
local function prequire(name) local success, result = pcall(require, name); return if success then result else nil end
local bench = script and require(script.Parent.bench_support) or prequire("bench_support") or require("../../bench_support")
function test()
local random, floor = math.random, math.floor
floor = math.ifloor or floor
function heapsort(n, ra)
local j, i, rra
local l = floor(n/2) + 1
-- local l = (n//2) + 1
local ir = n;
while 1 do
if l > 1 then
l = l - 1
rra = ra[l]
else
rra = ra[ir]
ra[ir] = ra[1]
ir = ir - 1
if (ir == 1) then
ra[1] = rra
return
end
end
i = l
j = l * 2
while j <= ir do
if (j < ir) and (ra[j] < ra[j+1]) then
j = j + 1
end
if rra < ra[j] then
ra[i] = ra[j]
i = j
j = j + i
else
j = ir + 1
end
end
ra[i] = rra
end
end
local Num = tonumber((arg and arg[1])) or 4
for i=1,Num do
local N = tonumber((arg and arg[2])) or 10000
local a = {}
for i=1,N do a[i] = random() end
heapsort(N, a)
for i=1,N-1 do assert(a[i] <= a[i+1]) end
end
end
bench.runCode(test, "heapsort")