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141 lines
4.5 KiB
141 lines
4.5 KiB
#include <cassert>
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#include <string>
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#include <iostream>
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#include <iomanip>
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#include <cmath>
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#include <chrono>
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#include "leveldb/db.h"
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// 配置
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const int TEST_EXPONENT = 5;
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const int TEST_FREQUENCY = static_cast<int>(std::pow(10, TEST_EXPONENT));
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const int MIN_STR_LEN = 255;
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const int MAX_STR_LEN = 1024;
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const std::string DB_PATH = "db_benchmark";
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const std::string CHARSET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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// 多语言
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const std::string BASE_VALUE = "こんにちは世界！Hello World! Привет, мир! ¡Hola Mundo! 你好，世界！Bonjour le monde! Hallo Welt!";
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// 莎士比亚
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// const std::string BASE_VALUE = "To be, or not to be, that is the question: Whether 'tis nobler in the mind to suffer the slings and arrows of outrageous fortune, or to take arms against a sea of troubles and by opposing end them.";
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// 超长字符
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// const std::string BASE_VALUE = []() {
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// std::string base = "壹贰叁肆伍陆柒捌玖拾";
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// std::string long_text;
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// for (int i = 0; i < 100; ++i) { // 重复 100 次
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// long_text += base;
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// }
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// return long_text;
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// }();
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// 随机字符串生成
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std::string randomStr() {
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int len = rand() % (MAX_STR_LEN - MIN_STR_LEN + 1) + MIN_STR_LEN;
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std::string str(len, '\0');
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for (int i = 0; i < len; ++i) {
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str[i] = CHARSET[rand() % CHARSET.size()];
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}
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return str;
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}
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// 计算并输出耗时的模板函数
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template<typename Func>
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void measureTime(const std::string& operation, Func func) {
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auto start = std::chrono::system_clock::now();
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func();
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auto end = std::chrono::system_clock::now();
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auto duration = std::chrono::duration_cast<std::chrono::microseconds>(end - start);
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double seconds = double(duration.count()) * std::chrono::microseconds::period::num / std::chrono::microseconds::period::den;
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// 输出格式化信息
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std::cout << "Operation: " << operation << "\n";
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std::cout << "Number of operations: " << TEST_FREQUENCY << "\n";
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std::cout << "Total time: "
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<< std::fixed << std::setprecision(6) << seconds << " seconds\n";
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std::cout << "Average time per operation: "
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<< std::fixed << std::setprecision(6)
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<< (seconds / TEST_FREQUENCY) * 1e6 << " microseconds\n";
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std::cout << "========================================\n";
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}
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int main() {
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leveldb::DB* db;
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leveldb::Options options;
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options.create_if_missing = true;
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// 打开数据库
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leveldb::Status status = leveldb::DB::Open(options, DB_PATH, &db);
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assert(status.ok());
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std::cout << "db open: " << DB_PATH << std::endl;
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srand(2017);
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// 生成测试数据
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std::string keys[TEST_FREQUENCY];
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for (int i = 0; i < TEST_FREQUENCY; ++i) {
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keys[i] = randomStr();
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}
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std::string value = BASE_VALUE;
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for (int i = 0; i < 4; ++i) {
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value += value; // 扩展 base value
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}
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// 测试添加
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measureTime("ADD", [&]() {
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for (int i = 0; i < TEST_FREQUENCY; ++i) {
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status = db->Put(leveldb::WriteOptions(), keys[i], value);
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assert(status.ok());
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}
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});
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// 测试获取
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measureTime("GET", [&]() {
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std::string retrievedValues[TEST_FREQUENCY];
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for (int i = 0; i < TEST_FREQUENCY; ++i) {
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status = db->Get(leveldb::ReadOptions(), keys[i], &retrievedValues[i]);
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assert(status.ok());
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assert(retrievedValues[i] == value); // 验证获取结果
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}
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});
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// 测试修改
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measureTime("UPDATE", [&]() {
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std::string newValue = value + value;
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for (int i = 0; i < TEST_FREQUENCY; ++i) {
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status = db->Put(leveldb::WriteOptions(), keys[i], newValue);
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assert(status.ok());
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}
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});
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// 测试删除
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measureTime("DELETE", [&]() {
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for (int i = 0; i < TEST_FREQUENCY; ++i) {
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status = db->Delete(leveldb::WriteOptions(), keys[i]);
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assert(status.ok());
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}
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});
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if (db) {
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delete db;
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db = nullptr;
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}
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std::cout << "Test completed, database has been closed." << std::endl;
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// Delete database directory
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#ifdef _WIN32
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std::string command = "rd /s /q \"" + DB_PATH + "\""; // Windows delete directory
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#else
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std::string command = "rm -rf \"" + DB_PATH + "\""; // Linux/macOS delete directory
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#endif
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if (std::system(command.c_str()) == 0) {
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std::cout << "Database directory has been successfully deleted" << std::endl;
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} else {
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std::cerr << "Warning: Failed to delete the database directory. Please check manually!" << std::endl;
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}
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return 0;
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}
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