This gist contains a Google Apps Script that performs some experiments to provide comparisons between data storage options. It was written in response to StackOverflow question [What is faster: ScriptDb or SpreadsheetApp?](http://stackoverflow.com/questions/15145918/what-is-faster-scriptdb-or-spreadsheetapp)

appsScriptSaveSpeed.js

/**
 * Run experiments to measure speed of various approaches to saving data in
 * Google App Script (GAS).
 */
function testSpeed() {
  var numObj = 400;
  var numAttr = 10;
  var doFlush = false;  // Set true to activate calls to SpreadsheetApp.flush()

  var arr = buildArray(numObj,numAttr);
  var start, stop;  // time catchers
  var db = ScriptDb.getMyDb();
  var sheet;

  // Save into ScriptDB, Object at a time
  deleteAll(); // Clear ScriptDB
  start = new Date().getTime();
    for (var i=1; i<=numObj; i++) {
      db.save({type: "myObj", data:arr[i]});
    }
  stop = new Date().getTime();
  Logger.log("Elapsed time for ScriptDB/Object test: " + (stop - start));

  // Save into ScriptDB, Batch
  var items = [];
  // Restructure data - this is done outside the timed loop, assuming that
  // the data would not be in an array if we were using this approach.
  for (var obj=1; obj<=numObj; obj++) {
    var thisObj = new Object();
    for (var attr=0; attr < numAttr; attr++) {
      thisObj[arr[0][attr]] = arr[obj][attr];
    }
    items.push(thisObj);
  }
  deleteAll(); // Clear ScriptDB
  start = new Date().getTime();
    db.saveBatch(items, false);
  stop = new Date().getTime();
  Logger.log("Elapsed time for ScriptDB/Batch test: " + (stop - start));

  // Save into Spreadsheet, Object at a time
  sheet = SpreadsheetApp.getActive().getActiveSheet().clear();
  start = new Date().getTime();
    for (var row=0; row<=numObj; row++) {
      var values = [];
      values.push(arr[row]);
      sheet.getRange(row+1, 1, 1, numAttr).setValues(values);
      if (doFlush) SpreadsheetApp.flush();
    }
  stop = new Date().getTime();
  Logger.log("Elapsed time for Spreadsheet/Object test: " + (stop - start));

  // Save into Spreadsheet, Attribute at a time
  sheet = SpreadsheetApp.getActive().getActiveSheet().clear();
  start = new Date().getTime();
    for (var row=0; row<=numObj; row++) {
      for (var cell=0; cell<numAttr; cell++) {
        sheet.getRange(row+1, cell+1, 1, 1).setValue(arr[row][cell]);
        if (doFlush) SpreadsheetApp.flush();
      }
    }
  stop = new Date().getTime();
  Logger.log("Elapsed time for Spreadsheet/Attribute test: " + (stop - start));

  // Save into Spreadsheet, Bulk
  sheet = SpreadsheetApp.getActive().getActiveSheet().clear();
  start = new Date().getTime();
    sheet.getRange(1, 1, numObj+1, numAttr).setValues(arr);
    if (doFlush) SpreadsheetApp.flush();
  stop = new Date().getTime();
  Logger.log("Elapsed time for Spreadsheet/Bulk test: " + (stop - start));
}

/**
 * Create a two-dimensional array populated with 'numObj' rows of 'numAttr' cells.
 */
function buildArray(numObj,numAttr) {
  numObj = numObj | 400;
  numAttr = numAttr | 10;
  var array = [];
  for (var obj = 0; obj <= numObj; obj++) {
    array[obj] = [];
    for (var attr = 0; attr < numAttr; attr++) {
      var value;
      if (obj == 0) {
        // Define attribute names / column headers
        value = "Attr"+attr;
      }
      else {
        value = ((attr % 2) == 0) ? "This is a reasonable sized string for testing purposes, not too long, not too short." : Number.MAX_VALUE;
      }
      array[obj].push(value);
    }
  }
  return array
}

/**
 * Delete all items from Database.
 * From https://developers.google.com/apps-script/scriptdb#deleting_all_items_from_the_database
 */
function deleteAll() {
  var db = ScriptDb.getMyDb();
  while (true) {
    var result = db.query({}); // get everything, up to limit
    if (result.getSize() == 0) {
      break;
    }
    while (result.hasNext()) {
      var item = result.next()
      db.remove(item);
    }
  }
}