Method Benchmark

src/leveldb/benchmarks/db_bench_tree_db.cc:288–308

  enum DBState { FRESH, EXISTING };

  Benchmark()
      : db_(nullptr),
        num_(FLAGS_num),
        reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
        bytes_(0),
        rand_(301) {
    std::vector<std::string> files;
    std::string test_dir;
    Env::Default()->GetTestDirectory(&test_dir);
    Env::Default()->GetChildren(test_dir.c_str(), &files);
    if (!FLAGS_use_existing_db) {
      for (int i = 0; i < files.size(); i++) {
        if (Slice(files[i]).starts_with("dbbench_polyDB")) {
          std::string file_name(test_dir);
          file_name += "/";
          file_name += files[i];
          Env::Default()->DeleteFile(file_name.c_str());
        }
      }
    }
  }

  ~Benchmark() {
    if (!db_->close()) {