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| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <html> |
| 3 <body> |
| 4 <script src = "../resources/runner.js"></script> |
| 5 <script> |
| 6 |
| 7 var startTime; |
| 8 var isDone = false; |
| 9 |
| 10 function createAndRead(size) { |
| 11 var reader = new FileReader(); |
| 12 var blob = new Blob([new Uint8Array(size)], {type: 'application/octet-string
'}); |
| 13 reader.onloadend = function(e) { |
| 14 if (reader.error) { |
| 15 throw new Error('Error when reading blob: ' + reader.error); |
| 16 } |
| 17 if (reader.result.byteLength != size) |
| 18 throw new Error("Sizes don't match"); |
| 19 PerfTestRunner.measureValueAsync(PerfTestRunner.now() - startTime); |
| 20 PerfTestRunner.addRunTestEndMarker(); |
| 21 if (!isDone) |
| 22 createAndRead(size); |
| 23 } |
| 24 PerfTestRunner.addRunTestStartMarker(); |
| 25 startTime = PerfTestRunner.now(); |
| 26 reader.readAsArrayBuffer(blob); |
| 27 } |
| 28 |
| 29 function runTest() { |
| 30 createAndRead(1024*1024); |
| 31 } |
| 32 |
| 33 window.onload = function () { |
| 34 PerfTestRunner.startMeasureValuesAsync({ |
| 35 unit: 'ms', |
| 36 done: function () { |
| 37 isDone = true; |
| 38 }, |
| 39 run: function() { |
| 40 runTest(); |
| 41 }, |
| 42 warmUpCount: 2, |
| 43 iterationCount: 6, |
| 44 description: "Measures performance of blob read.", |
| 45 tracingCategories: 'Blob', |
| 46 traceEventsToMeasure: ['BlobRequest', 'BlobRequest::ReadRawData'] |
| 47 }); |
| 48 }; |
| 49 </script> |
| 50 </body> |
| 51 </html> |
| 52 |
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Chromium Code Reviews
Issue 2864643002:
Support tracing metrics for measureValueAsync method (Closed)
