benchmarks/db_bench.cc [385:412]:
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    PrintEnvironment();
    std::fprintf(stdout, "Keys:       %d bytes each\n", kKeySize);
    std::fprintf(
        stdout, "Values:     %d bytes each (%d bytes after compression)\n",
        FLAGS_value_size,
        static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
    std::fprintf(stdout, "Entries:    %d\n", num_);
    std::fprintf(stdout, "RawSize:    %.1f MB (estimated)\n",
                 ((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
                  1048576.0));
    std::fprintf(
        stdout, "FileSize:   %.1f MB (estimated)\n",
        (((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
         1048576.0));
    PrintWarnings();
    std::fprintf(stdout, "------------------------------------------------\n");
  }

  void PrintWarnings() {
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
    std::fprintf(
        stdout,
        "WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
#endif
#ifndef NDEBUG
    std::fprintf(
        stdout,
        "WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
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benchmarks/db_bench_tree_db.cc [152:179]:
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    PrintEnvironment();
    std::fprintf(stdout, "Keys:       %d bytes each\n", kKeySize);
    std::fprintf(
        stdout, "Values:     %d bytes each (%d bytes after compression)\n",
        FLAGS_value_size,
        static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
    std::fprintf(stdout, "Entries:    %d\n", num_);
    std::fprintf(stdout, "RawSize:    %.1f MB (estimated)\n",
                 ((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
                  1048576.0));
    std::fprintf(
        stdout, "FileSize:   %.1f MB (estimated)\n",
        (((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
         1048576.0));
    PrintWarnings();
    std::fprintf(stdout, "------------------------------------------------\n");
  }

  void PrintWarnings() {
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
    std::fprintf(
        stdout,
        "WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
#endif
#ifndef NDEBUG
    std::fprintf(
        stdout,
        "WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
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