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ctl::string benchmarking code (#1200)
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// -*- mode:c++; indent-tabs-mode:nil; c-basic-offset:4; coding:utf-8 -*- | ||
// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi | ||
// | ||
// Copyright 2024 Justine Alexandra Roberts Tunney | ||
// | ||
// Permission to use, copy, modify, and/or distribute this software for | ||
// any purpose with or without fee is hereby granted, provided that the | ||
// above copyright notice and this permission notice appear in all copies. | ||
// | ||
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL | ||
// WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED | ||
// WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE | ||
// AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL | ||
// DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR | ||
// PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | ||
// TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | ||
// PERFORMANCE OF THIS SOFTWARE. | ||
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#include "ctl/string.h" | ||
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#include <__utility/move.h> | ||
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#include "libc/calls/struct/timespec.h" | ||
#include "libc/runtime/runtime.h" | ||
#include "libc/stdio/stdio.h" | ||
#include "libc/str/str.h" | ||
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#define BENCH(ITERATIONS, WORK_PER_RUN, CODE) \ | ||
do { \ | ||
struct timespec start = timespec_real(); \ | ||
for (int __i = 0; __i < ITERATIONS; ++__i) { \ | ||
asm volatile("" ::: "memory"); \ | ||
CODE; \ | ||
} \ | ||
long long work = (WORK_PER_RUN) * (ITERATIONS); \ | ||
double nanos = \ | ||
(timespec_tonanos(timespec_sub(timespec_real(), start)) + work - \ | ||
1) / \ | ||
(double)work; \ | ||
printf("%10g ns %2dx %s\n", nanos, (ITERATIONS), #CODE); \ | ||
} while (0) | ||
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const char* big_c = "aaaaaaaaaaaaaaaaaaaaaaaa"; | ||
const char* small_c = "aaaaaaaaaaaaaaaaaaaaaaa"; | ||
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int | ||
main() | ||
{ | ||
const ctl::string_view big(big_c), small(small_c); | ||
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BENCH(10000000, 1, { | ||
ctl::string s; | ||
s.append("hello "); | ||
s.append("world"); | ||
}); | ||
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BENCH(1000000, 8, { | ||
ctl::string s; | ||
for (int i = 0; i < 8; ++i) { | ||
s.append('a'); | ||
} | ||
}); | ||
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BENCH(1000000, 16, { | ||
ctl::string s; | ||
for (int i = 0; i < 16; ++i) { | ||
s.append('a'); | ||
} | ||
}); | ||
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BENCH(1000000, 23, { | ||
ctl::string s; | ||
for (int i = 0; i < 23; ++i) { | ||
s.append('a'); | ||
} | ||
}); | ||
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BENCH(1000000, 24, { | ||
ctl::string s; | ||
for (int i = 0; i < 24; ++i) { | ||
s.append('a'); | ||
} | ||
}); | ||
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BENCH(1000000, 32, { | ||
ctl::string s; | ||
for (int i = 0; i < 32; ++i) { | ||
s.append('a'); | ||
} | ||
}); | ||
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BENCH(1000000, 1, { ctl::string s(small_c); }); | ||
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BENCH(1000000, 1, { ctl::string s(small); }); | ||
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{ | ||
ctl::string small_copy("hello world"); | ||
BENCH(1000000, 1, { ctl::string s2(small_copy); }); | ||
} | ||
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BENCH(1000000, 1, { | ||
ctl::string s(small); | ||
ctl::string s2(std::move(s)); | ||
}); | ||
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BENCH(1000000, 1, { | ||
ctl::string s(small); | ||
ctl::string s2(s); | ||
}); | ||
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BENCH(1000000, 1, { ctl::string s(big_c); }); | ||
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BENCH(1000000, 1, { ctl::string s(big); }); | ||
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{ | ||
ctl::string big_copy(big); | ||
BENCH(1000000, 1, { ctl::string s2(big_copy); }); | ||
} | ||
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BENCH(1000000, 1, { | ||
ctl::string s(big); | ||
ctl::string s2(std::move(s)); | ||
}); | ||
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BENCH(1000000, 1, { | ||
ctl::string s(big); | ||
ctl::string s2(s); | ||
}); | ||
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BENCH(1000000, 1, { ctl::string s(23, 'a'); }); | ||
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BENCH(1000000, 1, { ctl::string s(24, 'a'); }); | ||
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{ | ||
ctl::string s(5, 'a'); | ||
BENCH(1000000, 1, { ctl::string_view s2(s); }); | ||
} | ||
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{ | ||
ctl::string big_trunc(48, 'a'); | ||
big_trunc.resize(4); | ||
BENCH(1000000, 1, { ctl::string s(big_trunc); }); | ||
} | ||
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return 0; | ||
} |