code: function initializeDatabase(silent, docCount) {
    var start, end, totalTime;
    var totalTimes = [];
    var totalMS = 0.0;
  
    if (typeof docCount === "undefined") {
      docCount = 5000;
    }
  
    arraySize = docCount;
  
    for (var idx = 0; idx < arraySize; idx++) {
      var v1 = genRandomVal();
      var v2 = genRandomVal();
  
      start = process.hrtime();
      samplecoll.insert({
        customId: idx,
        val: v1,
        val2: v2,
        val3: "more data 1234567890"
      });
      end = process.hrtime(start);
      totalTimes.push(end);
    }
  
    if (silent === true) {
      return;
    }
  
    for (var idx = 0; idx < totalTimes.length; idx++) {
      totalMS += totalTimes[idx][0] * 1e3 + totalTimes[idx][1] / 1e6;
    }
  
    // let's include final find which will probably punish lazy indexes more 
    start = process.hrtime();
    samplecoll.find({customIdx: 50});
    end = process.hrtime(start);
    totalTimes.push(end);
  
    //var totalMS = end[0] * 1e3 + end[1]/1e6;
    totalMS = totalMS.toFixed(2);
    var rate = arraySize * 1000 / totalMS;
    rate = rate.toFixed(2);
    console.log("load (individual inserts) : " + totalMS + "ms (" + rate + ") ops/s (" + arraySize + " documents)");
  }
docs: scenario for many individual, consecutive inserts