59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
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#include <iostream>
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#include <thread>
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#include <vector>
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#include "utils/assert.hpp"
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#include "utils/measure_time.hpp"
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#include "utils/memory/allocator.hpp"
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#include "utils/memory/maker.hpp"
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struct TestStructure {
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TestStructure(int a, int b, int c, int d) : a(a), b(b), c(c), d(d) {}
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int a, b, c, d;
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};
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void test_classic(int N) {
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TestStructure** xs = new TestStructure*[N];
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for (int i = 0; i < N; ++i) xs[i] = new TestStructure(i, i, i, i);
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for (int i = 0; i < N; ++i) delete xs[i];
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delete[] xs;
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}
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void test_fast(int N) {
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TestStructure** xs = new TestStructure*[N];
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for (int i = 0; i < N; ++i) xs[i] = makeme<TestStructure>(i, i, i, i);
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for (int i = 0; i < N; ++i) delete xs[i];
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delete[] xs;
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}
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int main(void) {
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constexpr int n_threads = 32;
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constexpr int N = 80000000 / n_threads;
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auto elapsed_classic = utils::measure_time<std::chrono::milliseconds>([&]() {
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std::vector<std::thread> threads;
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for (int i = 0; i < n_threads; ++i)
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threads.push_back(std::thread(test_classic, N));
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for (auto& thread : threads) {
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thread.join();
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}
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});
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std::cout << "Classic (new): " << elapsed_classic << "ms" << std::endl;
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auto elapsed_fast = utils::measure_time<std::chrono::milliseconds>([&]() {
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std::vector<std::thread> threads;
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for (int i = 0; i < n_threads; ++i)
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threads.push_back(std::thread(test_fast, N));
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for (auto& thread : threads) {
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thread.join();
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}
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});
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std::cout << "Fast (fast allocator): " << elapsed_fast << "ms" << std::endl;
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permanent_assert(elapsed_fast < elapsed_classic,
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"Custom fast allocator "
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"has to perform faster on simple array allocation");
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return 0;
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}
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