simple-blob-measure-async.html | Explore in Territory

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

var startTime;
var isDone = false;

function createAndRead(size) {
    var reader = new FileReader();
    var blob = new Blob([new Uint8Array(size)], {type: 'application/octet-string'});
    reader.onloadend = function(e) {
        if (reader.error) {
            throw new Error('Error when reading blob: ' + reader.error);
        }
        if (reader.result.byteLength != size)
            throw new Error("Sizes don't match");
        PerfTestRunner.measureValueAsync(PerfTestRunner.now() - startTime);
        PerfTestRunner.addRunTestEndMarker();
        if (!isDone)
            createAndRead(size);
    }
    PerfTestRunner.addRunTestStartMarker();
    startTime = PerfTestRunner.now();
    reader.readAsArrayBuffer(blob);
}

function runTest() {
  createAndRead(1024*1024);
}

window.onload = function () {
    PerfTestRunner.startMeasureValuesAsync({
        unit: 'ms',
        done: function () {
            isDone = true;
        },
        run: function() {
            runTest();
        },
        warmUpCount: 2,
        iterationCount: 6,
        description: "Measures performance of blob read.",
        tracingCategories: 'Blob',
        traceEventsToMeasure: ['BlobRequest', 'BlobRequest::ReadRawData',
                               'BlobReader', 'BlobReader::ReadMore']
    });
};
</script>
</body>
</html>
chromium/third_party/blink/perf_tests/test_data/simple-blob-measure-async.html
