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Relicense permission collected from all relevant authors as tallied at: https://github.com/rlenferink/libzmq-relicense/blob/master/checklist.md The relicense grants are collected under RELICENSE/ and will be moved to the above repository in a later commit. Fixes https://github.com/zeromq/libzmq/issues/2376
105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
/* SPDX-License-Identifier: MPL-2.0 */
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#if __cplusplus >= 201103L
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#include "radix_tree.hpp"
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#include "trie.hpp"
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#include <chrono>
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#include <cstddef>
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#include <cstdio>
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#include <random>
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#include <ratio>
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#include <vector>
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const std::size_t nkeys = 10000;
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const std::size_t nqueries = 1000000;
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const std::size_t warmup_runs = 10;
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const std::size_t samples = 10;
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const std::size_t key_length = 20;
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const char *chars = "abcdefghijklmnopqrstuvwxyz0123456789";
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const int chars_len = 36;
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template <class T>
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void benchmark_lookup (T &subscriptions_,
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std::vector<unsigned char *> &queries_)
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{
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using namespace std::chrono;
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std::vector<duration<long, std::nano> > samples_vec;
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samples_vec.reserve (samples);
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for (std::size_t run = 0; run < warmup_runs; ++run) {
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for (auto &query : queries_)
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subscriptions_.check (query, key_length);
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}
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for (std::size_t run = 0; run < samples; ++run) {
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duration<long, std::nano> interval (0);
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for (auto &query : queries_) {
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auto start = steady_clock::now ();
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subscriptions_.check (query, key_length);
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auto end = steady_clock::now ();
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interval += end - start;
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}
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samples_vec.push_back (interval / queries_.size ());
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}
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std::size_t sum = 0;
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for (const auto &sample : samples_vec)
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sum += sample.count ();
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std::printf ("Average lookup time = %.1lf ns\n",
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static_cast<double> (sum) / samples);
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}
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int main ()
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{
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// Generate input set.
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std::minstd_rand rng (123456789);
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std::vector<unsigned char *> input_set;
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std::vector<unsigned char *> queries;
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input_set.reserve (nkeys);
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queries.reserve (nqueries);
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for (std::size_t i = 0; i < nkeys; ++i) {
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unsigned char *key = new unsigned char[key_length];
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for (std::size_t j = 0; j < key_length; j++)
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key[j] = static_cast<unsigned char> (chars[rng () % chars_len]);
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input_set.emplace_back (key);
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}
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for (std::size_t i = 0; i < nqueries; ++i)
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queries.push_back (input_set[rng () % nkeys]);
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// Initialize both data structures.
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//
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// Keeping initialization out of the benchmarking function helps
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// heaptrack detect peak memory consumption of the radix tree.
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zmq::trie_t trie;
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zmq::radix_tree_t radix_tree;
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for (auto &key : input_set) {
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trie.add (key, key_length);
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radix_tree.add (key, key_length);
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}
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// Create a benchmark.
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std::printf ("keys = %llu, queries = %llu, key size = %llu\n",
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static_cast<unsigned long long> (nkeys),
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static_cast<unsigned long long> (nqueries),
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static_cast<unsigned long long> (key_length));
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std::puts ("[trie]");
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benchmark_lookup (trie, queries);
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std::puts ("[radix_tree]");
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benchmark_lookup (radix_tree, queries);
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for (auto &op : input_set)
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delete[] op;
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}
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#else
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int main ()
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{
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}
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#endif
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