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src/leveldb/util/histogram.h
44 строки
925 B
Wladimir J. van der Laan
Update to leveldb upstream using subtree merge
28 янв 2020, 18:59
28 янв 2020, 18:59
20a6bab
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. See the AUTHORS file for names of contributors. #ifndef STORAGE_LEVELDB_UTIL_HISTOGRAM_H_ #define STORAGE_LEVELDB_UTIL_HISTOGRAM_H_ #include <string> namespace leveldb { class Histogram { public: Histogram() {} ~Histogram() {} void Clear(); void Add(double value); void Merge(const Histogram& other); std::string ToString() const; private: enum { kNumBuckets = 154 }; double Median() const; double Percentile(double p) const; double Average() const; double StandardDeviation() const; static const double kBucketLimit[kNumBuckets]; double min_; double max_; double num_; double sum_; double sum_squares_; double buckets_[kNumBuckets]; }; } // namespace leveldb #endif // STORAGE_LEVELDB_UTIL_HISTOGRAM_H_