The Tor Browser / file comparison
comparison: js/src/parjs-benchmarks/edges.js
js/src/parjs-benchmarks/edges.js
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
equal
deleted
inserted
replaced
| -1:000000000000 | 0:c0c45f780f72 |
|---|---|
| 1 load(libdir + "util.js"); | |
| 2 | |
| 3 var SobelX = [[-1.0, 0.0, 1.0], | |
| 4 [-2.0, 0.0, 2.0], | |
| 5 [-1.0, 0.0, 1.0]]; | |
| 6 var SobelY = [[ 1.0, 2.0, 1.0], | |
| 7 [ 0.0, 0.0, 0.0], | |
| 8 [-1.0, -2.0, -1.0]]; | |
| 9 | |
| 10 function stripedImage(w, h) { | |
| 11 var resultArray = new Array(w * h); | |
| 12 for (var y = 0; y < h; y++) { | |
| 13 for (var x = 0; x < w; x++) { | |
| 14 resultArray[y*w + x] = (Math.abs(x%100-y%100) < 10) ? 32 : 0; | |
| 15 } | |
| 16 } | |
| 17 return resultArray; | |
| 18 } | |
| 19 | |
| 20 function edgesSequentially(data, width, height) { | |
| 21 var data1 = new Array(width * height); | |
| 22 for (var y = 0; y < height; y++) { | |
| 23 for (var x = 0; x < width; x++) { | |
| 24 var total = compute(x, y); | |
| 25 data1[y*width + x] = total | 0; | |
| 26 } | |
| 27 } | |
| 28 return data1; | |
| 29 | |
| 30 function compute(x, y) { | |
| 31 var totalX = 0; | |
| 32 var totalY = 0; | |
| 33 | |
| 34 var offYMin = (y == 0 ? 0 : -1); | |
| 35 var offYMax = (y == height - 1 ? 0 : 1); | |
| 36 var offXMin = (x == 0 ? 0 : -1); | |
| 37 var offXMax = (x == width - 1 ? 0 : 1); | |
| 38 | |
| 39 for (var offY = offYMin; offY <= offYMax; offY++) { | |
| 40 for (var offX = offXMin; offX <= offXMax; offX++) { | |
| 41 var e = data[(y + offY) * width + x + offX]; | |
| 42 totalX += e * SobelX[offY + 1][offX + 1]; | |
| 43 totalY += e * SobelY[offY + 1][offX + 1]; | |
| 44 } | |
| 45 } | |
| 46 | |
| 47 return (Math.abs(totalX) + Math.abs(totalY))/8.0 | 0; | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 function edgesParallel(data) { | |
| 52 var pa = new ParallelArray([Height, Width], function (y, x) { | |
| 53 var totalX = 0; | |
| 54 var totalY = 0; | |
| 55 | |
| 56 var offYMin = (y == 0 ? 0 : -1); | |
| 57 var offYMax = (y == Height - 1 ? 0 : 1); | |
| 58 var offXMin = (x == 0 ? 0 : -1); | |
| 59 var offXMax = (x == Width - 1 ? 0 : 1); | |
| 60 | |
| 61 for (var offY = offYMin; offY <= offYMax; offY++) { | |
| 62 for (var offX = offXMin; offX <= offXMax; offX++) { | |
| 63 var e = data.get(y + offY, x + offX); | |
| 64 totalX += e * SobelX[offY + 1][offX + 1]; | |
| 65 totalY += e * SobelY[offY + 1][offX + 1]; | |
| 66 } | |
| 67 } | |
| 68 | |
| 69 return (Math.abs(totalX) + Math.abs(totalY))/8.0 | 0; | |
| 70 }); | |
| 71 return pa.flatten(); | |
| 72 } | |
| 73 | |
| 74 var Width = 1024; | |
| 75 var Height = 768; | |
| 76 var ArrInput = stripedImage(Width, Height); | |
| 77 var ParArrInput2D = new ParallelArray([Height, Width], | |
| 78 function (y, x) ArrInput[y*Width + x]); | |
| 79 | |
| 80 benchmark("EDGES", 2, DEFAULT_MEASURE * 20, | |
| 81 function() edgesSequentially(ArrInput, Width, Height), | |
| 82 function() edgesParallel(ParArrInput2D)); |
