mirror of
https://github.com/jart/cosmopolitan.git
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92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
// -*- mode:c++; indent-tabs-mode:nil; c-basic-offset:4; coding:utf-8 -*-
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// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
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//
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// Copyright 2024 Justine Alexandra Roberts Tunney
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//
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// Permission to use, copy, modify, and/or distribute this software for
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// any purpose with or without fee is hereby granted, provided that the
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// above copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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// WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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// AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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// DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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// PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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// TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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#include "ctl/set.h"
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#include "libc/calls/struct/rusage.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/mem/leaks.h"
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#include "libc/stdio/stdio.h"
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#include "libc/sysv/consts/rusage.h"
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// #include <set>
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// #define ctl std
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// #define check() size()
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#define BENCH(ITERATIONS, WORK_PER_RUN, CODE) \
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do { \
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struct timespec start = timespec_real(); \
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for (int __i = 0; __i < ITERATIONS; ++__i) { \
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asm volatile("" ::: "memory"); \
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CODE; \
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} \
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long long work = (WORK_PER_RUN) * (ITERATIONS); \
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double nanos = \
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(timespec_tonanos(timespec_sub(timespec_real(), start)) + work - \
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1) / \
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(double)work; \
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printf("%10g ns %2dx %s\n", nanos, (ITERATIONS), #CODE); \
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} while (0)
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int
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rand32(void)
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{
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/* Knuth, D.E., "The Art of Computer Programming," Vol 2,
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Seminumerical Algorithms, Third Edition, Addison-Wesley, 1998,
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p. 106 (line 26) & p. 108 */
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static unsigned long long lcg = 1;
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lcg *= 6364136223846793005;
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lcg += 1442695040888963407;
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return lcg >> 32;
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}
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void
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eat(int x)
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{
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}
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void (*pEat)(int) = eat;
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int
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main()
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{
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{
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long x = 0;
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ctl::set<long> s;
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BENCH(1000000, 1, s.insert(rand32() % 1000000));
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// s.check();
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BENCH(1000000, 1, {
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auto i = s.find(rand32() % 1000000);
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if (i != s.end())
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x += *i;
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});
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BENCH(1000000, 1, {
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auto i = s.lower_bound(rand32() % 1000000);
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if (i != s.end())
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x += *i;
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});
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BENCH(1000000, 1, s.erase(rand32() % 1000000));
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eat(x);
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}
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struct rusage ru;
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getrusage(RUSAGE_SELF, &ru);
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printf("%,10d kb peak rss\n", ru.ru_maxrss);
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CheckForMemoryLeaks();
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}
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