121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright 2009 William Hart
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Copyright 2011 Fredrik Johansson
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <mpfr.h>
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#include "profiler.h"
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#include "flint.h"
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#include "fmpz_mat.h"
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#include "fmpz.h"
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#include "fmpz_vec.h"
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#include "arith.h"
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typedef struct
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{
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ulong n;
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int algorithm;
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} bernoulli_vec_t;
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void sample(void * arg, ulong count)
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{
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fmpz * num;
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fmpz * den;
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bernoulli_vec_t * params = (bernoulli_vec_t *) arg;
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ulong n = params->n;
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slong i;
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int algorithm = params->algorithm;
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num = _fmpz_vec_init(n);
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den = _fmpz_vec_init(n);
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prof_start();
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for (i = 0; i < count; i++)
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{
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if (algorithm == 0)
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{
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_arith_bernoulli_number_vec_recursive(num, den, n);
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}
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else if (algorithm == 1)
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{
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_arith_bernoulli_number_vec_multi_mod(num, den, n);
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}
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else if (algorithm == 2)
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{
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_arith_bernoulli_number_vec_zeta(num, den, n);
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mpfr_free_cache();
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}
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}
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prof_stop();
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_fmpz_vec_clear(num, n);
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_fmpz_vec_clear(den, n);
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}
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int main(void)
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{
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double min_recursive, min_multi_mod, min_zeta, max;
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bernoulli_vec_t params;
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slong n;
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flint_printf("n / recursive / multi_mod / zeta / best [times in us]\n");
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for (n = 2; n <= 10000; n = (slong) ((double) n * 1.2) + 1)
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{
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params.n = n;
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if (n < 1500)
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{
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params.algorithm = 0;
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prof_repeat(&min_recursive, &max, sample, ¶ms);
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}
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else
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min_recursive = 0.0;
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params.algorithm = 1;
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prof_repeat(&min_multi_mod, &max, sample, ¶ms);
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params.algorithm = 2;
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prof_repeat(&min_zeta, &max, sample, ¶ms);
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flint_printf("%wd %.2f %.2f %.2f ",
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n, min_recursive, min_multi_mod, min_zeta);
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if (min_recursive && min_recursive < min_multi_mod && \
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min_recursive < min_zeta)
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flint_printf("(recursive)\n");
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else if (min_multi_mod < min_zeta)
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flint_printf("(multi_mod)\n");
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else
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flint_printf("(zeta)\n");
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}
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return 0;
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}
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