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https://github.com/luau-lang/luau.git
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75 lines
2.0 KiB
Lua
75 lines
2.0 KiB
Lua
--[[
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MIT License
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Copyright (c) 2017 Gabriel de Quadros Ligneul
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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]]
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-- The Computer Language Benchmarks Game
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-- http://benchmarksgame.alioth.debian.org/
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-- contributed by Mike Pall
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local bench = script and require(script.Parent.bench_support) or require("bench_support")
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function test()
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local function A(i, j)
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local ij = i+j-1
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return 1.0 / (ij * (ij-1) * 0.5 + i)
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end
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local function Av(x, y, N)
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for i=1,N do
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local a = 0
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for j=1,N do a = a + x[j] * A(i, j) end
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y[i] = a
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end
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end
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local function Atv(x, y, N)
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for i=1,N do
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local a = 0
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for j=1,N do a = a + x[j] * A(j, i) end
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y[i] = a
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end
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end
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local function AtAv(x, y, t, N)
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Av(x, t, N)
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Atv(t, y, N)
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end
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local N = tonumber(arg and arg[1]) or 100
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local u, v, t = {}, {}, {}
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for i=1,N do u[i] = 1 end
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for i=1,10 do AtAv(u, v, t, N) AtAv(v, u, t, N) end
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local vBv, vv = 0, 0
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for i=1,N do
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local ui, vi = u[i], v[i]
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vBv = vBv + ui*vi
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vv = vv + vi*vi
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end
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print(string.format("%0.9f\n", math.sqrt(vBv / vv)))
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end
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bench.runCode(test, "spectral-norm")
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