<!DOCTYPE html>
<html>
<body>
<script src="../../resources/runner.js"></script>
<script>

var iterationCount = 20;
var numberDeleted = 0;

// Delete all databases for the test ahead of time.
var databasePrefix = "large-number-of-inserts-DB-";
for (var i = 0; i < iterationCount + 1; ++i) {
    indexedDB.deleteDatabase(databasePrefix + i).onsuccess = function() {
        if (++numberDeleted == iterationCount)
            startIteration();
    }
}

var testGenerator = null;
var db = null;
var currentIteration = 0;

PerfTestRunner.prepareToMeasureValuesAsync({
    customIterationCount: iterationCount,
    unit: 'ms',
    done: function () {
        db = null;
        testGenerator = null;
        PerfTestRunner.gc();
        ++currentIteration;
    }
});

function startIteration()
{
    testGenerator = runIteration();
    nextStep();
}

function nextStep()
{
    testGenerator.next();
}

var numberOfObjects = 100000;
var objectsToInsert = new Array(numberOfObjects);
for (var i = 0; i < numberOfObjects; ++i) {
    objectsToInsert[i] = { data: Math.random() };
    objectsToInsert[i].id = 'object_' + i;
}

function *runIteration()
{
    var openRequest = indexedDB.open(databasePrefix + currentIteration);
    openRequest.onupgradeneeded = function(event) {
        db = event.target.result;
        db.createObjectStore('objects', {keyPath: 'id'});
    }
    openRequest.onsuccess = nextStep;

    yield;

    var startTime = PerfTestRunner.now();

    var objectStore = db.transaction('objects', 'readwrite').objectStore('objects');
    objectStore.transaction.oncomplete = nextStep;
    for (var i = 0; i < numberOfObjects; ++i)
        objectStore.put(objectsToInsert[i]);

    yield;

    if (!PerfTestRunner.measureValueAsync(PerfTestRunner.now() - startTime))
        return;

    setTimeout(startIteration, 0);
}

</script>
</body>
</html>