performance measurements

Each table row shows performance measurements for this Lua program with a particular command-line input value N.

 N  CPU secs Elapsed secs Memory KB Code B ≈ CPU Load
2,000Failed  479   

Read the ↓ make, command line, and program output logs to see how this program was run.

Read pidigits benchmark to see what this program should do.

 notes

Lua 5.3.0 Copyright (C) 1994-2015 Lua.org, PUC-Rio

 pidigits Lua #5 program source code

-- The Computer Language Benchmarks Game
-- http://benchmarksgame.alioth.debian.org/
-- contributed by Mike Pall
-- requires LGMP "A GMP package for Lua 5.1"
-- with matrix optimization, courtesy of Wim Couwenberg

local g, aux = {}, {}
require"c-gmp"(g, aux)
local add, mul, div = g.mpz_add, g.mpz_mul_si, g.mpz_tdiv_q
local init, get = g.mpz_init_set_d, g.mpz_get_d

local u, v, w

local function produce(n1, n2, d, k)
  mul(n1, 2*k-1, u)
  add(n2, n2, v)
  mul(n1, k-1, w)
  add(u, v, n1)
  mul(n2, k+2, u)
  add(w, u, n2)
  mul(d, 2*k+1, d)
end

local function extract(n1, n2, d, y)
  mul(d, -10*y, u)
  mul(n1, 10, n1)
  add(n1, u, n1)
  mul(n2, 10, n2)
  add(n2, u, n2)
end

local function digit(n1, n2, d)
  local y = get(div(n1, d, u))
  if y == get(div(n2, d, v)) then return y end
end

-- Generate successive digits of PI.
local function pidigits(N)
  local write = io.write
  local k = 1
  local n1, n2, d = init(4), init(3), init(1)
  u, v, w = init(0), init(0), init(0)
  local i = 0
  while i < N do
    local y = digit(n1, n2, d)
    if y then
      write(y)
      i = i + 1; if i % 10 == 0 then write("\t:", i, "\n") end
      extract(n1, n2, d, y)
    else
      produce(n1, n2, d, k)
      k = k + 1
    end
  end
  if i % 10 ~= 0 then write(string.rep(" ", 10 - N % 10), "\t:", N, "\n") end
end

local N = tonumber(arg and arg[1]) or 27
pidigits(N)

 make, command-line, and program output logs

Tue, 13 Jan 2015 01:18:20 GMT

COMMAND LINE:
/usr/local/src/lua-5.3.0/bin/lua  pidigits.lua-5.lua 2000

PROGRAM FAILED 


PROGRAM OUTPUT:

/usr/local/src/lua-5.3.0/bin/lua: pidigits.lua-5.lua:8: module 'c-gmp' not found:
	no field package.preload['c-gmp']
	no file '/usr/local/share/lua/5.3/c-gmp.lua'
	no file '/usr/local/share/lua/5.3/c-gmp/init.lua'
	no file '/usr/local/lib/lua/5.3/c-gmp.lua'
	no file '/usr/local/lib/lua/5.3/c-gmp/init.lua'
	no file './c-gmp.lua'
	no file './c-gmp/init.lua'
	no file '/usr/local/lib/lua/5.3/c-gmp.so'
	no file '/usr/local/lib/lua/5.3/loadall.so'
	no file './c-gmp.so'
stack traceback:
	[C]: in function 'require'
	pidigits.lua-5.lua:8: in main chunk
	[C]: in ?

Revised BSD license

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