127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
/*
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* IndexedSet.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2020-2020 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FLOW_TREEBENCHMARK_H
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#define FLOW_TREEBENCHMARK_H
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#pragma once
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#include "flow/flow.h"
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#include <random>
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struct opTimer {
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double start = timer();
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char const* name;
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int opCount;
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opTimer(char const* name, int opCount) : name(name), opCount(opCount) {}
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~opTimer() { printf("%s: %0.1f Kop/s\n", name, (opCount / 1000.0) / (timer() - start)); }
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};
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template <typename F, typename T>
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void timedRun(char const* name, T& t, F f) {
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opTimer timer(name, t.size());
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for (auto& i : t) {
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f(i);
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}
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}
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template <typename K>
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struct MapHarness {
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using map = std::map<K, int>;
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using key_type = K;
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struct result {
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typename map::const_iterator it;
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result(typename map::const_iterator it) : it(it) {}
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result& operator++() {
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it++;
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return *this;
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}
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const K& operator*() const { return (*it).first; }
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const K& operator->() const { return it->first; }
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bool operator==(result const& k) const { return it == k.it; }
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bool operator!=(result const& k) const { return it != k.it; }
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};
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map s;
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void insert(K const& k) { s.insert(std::pair<K, int>(k, 1)); }
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result find(K const& k) const { return result(s.find(k)); }
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result not_found() const { return result(s.end()); }
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result begin() const { return result(s.begin()); }
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result end() const { return result(s.end()); }
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result lower_bound(K const& k) const { return result(s.lower_bound(k)); }
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result upper_bound(K const& k) const { return result(s.upper_bound(k)); }
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void erase(K const& k) { s.erase(k); }
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};
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template <typename T, typename F>
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void treeBenchmark(T& tree, F generateKey) {
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std::mt19937_64 urng(deterministicRandom()->randomUInt32());
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using key = typename T::key_type;
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int keyCount = 1000000;
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std::vector<key> keys;
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for (int i = 0; i < keyCount; i++) {
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keys.push_back(generateKey());
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}
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timedRun("insert", keys, [&tree](key const& k) { tree.insert(k); });
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timedRun("find", keys, [&tree](key const& k) { ASSERT(tree.find(k) != tree.not_found()); });
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timedRun("lower_bound", keys, [&tree](key const & k) { ASSERT(tree.lower_bound(k) != tree.not_found()); });
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timedRun("upper_bound", keys, [&tree](key const & k) { tree.upper_bound(k); });
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std::sort(keys.begin(), keys.end());
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keys.resize(std::unique(keys.begin(), keys.end()) - keys.begin());
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auto iter = tree.lower_bound(*keys.begin());
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timedRun("scan", keys, [&tree, &iter](key const& k) {
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ASSERT(k == *iter);
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++iter;
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});
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ASSERT(iter == tree.end());
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timedRun("find (sorted)", keys, [&tree](key const& k) { ASSERT(tree.find(k) != tree.end()); });
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std::shuffle(keys.begin(), keys.end(), urng);
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timedRun("erase", keys, [&tree](key const& k) { tree.erase(k); });
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ASSERT(tree.begin() == tree.end());
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}
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static inline StringRef randomStr(Arena& arena) {
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size_t keySz = 100;
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return StringRef(arena, deterministicRandom()->randomAlphaNumeric(keySz));
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}
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static inline int randomInt() {
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return deterministicRandom()->randomInt(0, INT32_MAX);
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}
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#endif // FLOW_TREEBENCHMARK_H
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