benchmarks/db_bench_tree_db.cc [264:290]:
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  void Stop(const Slice& name) {
    double finish = Env::Default()->NowMicros() * 1e-6;

    // Pretend at least one op was done in case we are running a benchmark
    // that does not call FinishedSingleOp().
    if (done_ < 1) done_ = 1;

    if (bytes_ > 0) {
      char rate[100];
      std::snprintf(rate, sizeof(rate), "%6.1f MB/s",
                    (bytes_ / 1048576.0) / (finish - start_));
      if (!message_.empty()) {
        message_ = std::string(rate) + " " + message_;
      } else {
        message_ = rate;
      }
    }

    std::fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
                 name.ToString().c_str(), (finish - start_) * 1e6 / done_,
                 (message_.empty() ? "" : " "), message_.c_str());
    if (FLAGS_histogram) {
      std::fprintf(stdout, "Microseconds per op:\n%s\n",
                   hist_.ToString().c_str());
    }
    std::fflush(stdout);
  }
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benchmarks/db_bench_sqlite3.cc [286:312]:
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  void Stop(const Slice& name) {
    double finish = Env::Default()->NowMicros() * 1e-6;

    // Pretend at least one op was done in case we are running a benchmark
    // that does not call FinishedSingleOp().
    if (done_ < 1) done_ = 1;

    if (bytes_ > 0) {
      char rate[100];
      std::snprintf(rate, sizeof(rate), "%6.1f MB/s",
                    (bytes_ / 1048576.0) / (finish - start_));
      if (!message_.empty()) {
        message_ = std::string(rate) + " " + message_;
      } else {
        message_ = rate;
      }
    }

    std::fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
                 name.ToString().c_str(), (finish - start_) * 1e6 / done_,
                 (message_.empty() ? "" : " "), message_.c_str());
    if (FLAGS_histogram) {
      std::fprintf(stdout, "Microseconds per op:\n%s\n",
                   hist_.ToString().c_str());
    }
    std::fflush(stdout);
  }
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