Iterator game.
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@ -87,14 +87,12 @@ using namespace cxxmph;
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int main(int argc, char** argv) {
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srandom(4);
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/*
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Benchmark::Register(new BM_CreateUrls<mph_map<StringPiece, StringPiece>>("URLS100k"));
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Benchmark::Register(new BM_CreateUrls<unordered_map<StringPiece, StringPiece>>("URLS100k"));
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Benchmark::Register(new BM_SearchUrls<mph_map<StringPiece, StringPiece>>("URLS100k", 10*1000 * 1000, 0));
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Benchmark::Register(new BM_SearchUrls<unordered_map<StringPiece, StringPiece, Murmur2StringPiece>>("URLS100k", 10*1000 * 1000, 0));
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Benchmark::Register(new BM_SearchUrls<mph_map<StringPiece, StringPiece>>("URLS100k", 10*1000 * 1000, 0.9));
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Benchmark::Register(new BM_SearchUrls<unordered_map<StringPiece, StringPiece, Murmur2StringPiece>>("URLS100k", 10*1000 * 1000, 0.9));
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*/
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Benchmark::Register(new BM_SearchUint64<unordered_map<uint64_t, uint64_t>>);
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Benchmark::Register(new BM_SearchUint64<mph_map<uint64_t, uint64_t>>);
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Benchmark::RunAll();
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@ -41,8 +41,18 @@ class mph_map {
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typedef typename std::vector<value_type>::const_reference const_reference;
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typedef typename std::vector<value_type>::size_type size_type;
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typedef typename std::vector<value_type>::difference_type difference_type;
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typedef typename std::vector<value_type>::iterator iterator;
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typedef typename std::vector<value_type>::const_iterator const_iterator;
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template <class T, typename iterator>
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struct indirect_iterator : public typename slack_type::iterator {
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indirect_iterator(T* v, iterator it) : iterator(it), v_(v) { }
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const typename iterator::value_type::first_type& operator*() const {
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return v->begin() + (this->iterator::operator*())->second;
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}
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};
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typedef indirect_iterator<std::vector<value_type>, slack_type>::iterator iterator;
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typedef indirect_iterator<std::vector<value_type>, slack_type>::const_iterator const_iterator;
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// For making macros simpler.
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typedef void void_type;
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@ -69,7 +79,7 @@ class mph_map {
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data_type& operator[](const key_type &k);
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const data_type& operator[](const key_type &k) const;
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size_type bucket_count() const { return size(); }
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size_type bucket_count() const { return index_.perfect_hash_size() + slack_.bucket_count(); }
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// FIXME: not sure if this has the semantics I want
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void rehash(size_type nbuckets /*ignored*/) { pack(); }
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@ -80,7 +90,7 @@ class mph_map {
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template <typename iterator>
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struct iterator_first : public iterator {
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iterator_first(iterator it) : iterator(it) { }
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const typename iterator::value_type::first_type& operator*() const {
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const typename iterator::value_type::first_type& operator*() const {
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return this->iterator::operator*().first;
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}
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};
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@ -90,6 +100,11 @@ class mph_map {
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return iterator_first<iterator>(it);
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}
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template <class T, typename iterator>
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indirect_iterator<iterator> make_indirect_iterator(T* v, iterator it) {
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return indirect_iterator<iterator>(v, it);
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}
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void pack();
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std::vector<value_type> values_;
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SimpleMPHIndex<Key, typename seeded_hash<HashFcn>::hash_function> index_;
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@ -113,31 +128,39 @@ MPH_MAP_TMPL_SPEC MPH_MAP_CLASS_SPEC::~mph_map() {
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MPH_MAP_METHOD_DECL(insert_return_type, insert)(const value_type& x) {
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iterator it = find(x.first);
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if (it != end()) return make_pair(it, false);
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should_pack = false;
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if (values_.capacity() == values_.size() && values_.size() > 256) {
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should_pack = true;
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}
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values_.push_back(x);
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slack_.insert(make_pair(x.first, values_.size() - 1));
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if (slack_.size() == index_.size() ||
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(slack_.size() >= 256 && index_.size() == 0)) {
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pack();
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}
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if (should_pack) pack();
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it = find(x.first);
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return make_pair(it, true);
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}
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MPH_MAP_METHOD_DECL(void_type, pack)() {
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if (values_.empty()) return;
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slack_type().swap(slack_);
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bool success = index_.Reset(
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make_iterator_first(values_.begin()),
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make_iterator_first(values_.end()));
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make_iterator_first(slack_.begin())),
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make_iterator_first(slack_.end())));
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assert(success);
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std::vector<value_type> new_values(values_.size());
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std::vector<value_type> new_values(index_.size());
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for (const_iterator it = values_.begin(), end = values_.end();
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it != end; ++it) {
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size_type id = index_.index(it->first);
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size_type id = index_.index((*it)->first);
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assert(id < new_values.size());
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new_values[id] = *it;
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}
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values_.swap(new_values);
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std::vector<size_type> new_values_pointer(
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index_.perfect_hash_size());;
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for (size_type i = 0; i < values_.size(); ++i) {
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size_type id = index_.perfect_hash(values_[i].first);
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assert(id < new_values_pointer.size());
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new_values_pointer[id] = i;
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}
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values_pointer_.swap(new_values_pointer);
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}
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MPH_MAP_METHOD_DECL(iterator, begin)() { return values_.begin(); }
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@ -169,25 +192,25 @@ MPH_MAP_METHOD_DECL(const_iterator, find)(const key_type& k) const {
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if (it != slack_.end()) return values_.begin() + it->second;
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}
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if (__builtin_expect(index_.size() == 0, 0)) return end();
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const_iterator it = values_.begin() + index_.index(k);
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const_iterator it = values_.begin() + values_pointer_[index_.perfect_hash(k)];
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if (__builtin_expect(equal_(k, it->first), 1)) return it;
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return end();
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}
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MPH_MAP_METHOD_DECL(iterator, find)(const key_type& k) {
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if (!slack_.empty()) {
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if (__builtin_expect(!slack_.empty(), 0)) {
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typename slack_type::const_iterator it = slack_.find(k);
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if (it != slack_.end()) return values_.begin() + it->second;
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}
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if (index_.size() == 0) return end();
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iterator it = values_.begin() + index_.index(k);
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if (equal_(it->first, k)) return it;
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if (__builtin_expect(index_.size() == 0, 0)) return end();
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iterator it = values_.begin() + values_pointer_[index_.perfect_hash(k)];
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if (__builtin_expect(equal_(k, it->first), 1)) return it;
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return end();
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}
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MPH_MAP_METHOD_DECL(my_int32_t, index)(const key_type& k) const {
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if (index_.size() == 0) return -1;
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return index_.index(k);
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return index_.perfect_hash(k);
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}
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MPH_MAP_METHOD_DECL(data_type&, operator[])(const key_type& k) {
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