Changed BW calculation PNG images to be incompressible

Web servers and other devices may be configured to compress images before delivering them to client browsers. This commit replaces the original images used in bandwidth calculations with ones that cannot be compressed (much). The bw.js plugin has been updated to reflect the new image file sizes.
bluesmoon · Feb 2, 2015 · 4bed2a6 · 4bed2a6
1 parent 7b2dab5
commit 4bed2a6
Show file tree

Hide file tree

Showing 8 changed files with 12 additions and 7 deletions.
diff --git a/images/image-0.png b/images/image-0.png
diff --git a/images/image-1.png b/images/image-1.png
diff --git a/images/image-2.png b/images/image-2.png
diff --git a/images/image-3.png b/images/image-3.png
diff --git a/images/image-4.png b/images/image-4.png
diff --git a/images/image-5.png b/images/image-5.png
diff --git a/images/image-6.png b/images/image-6.png
diff --git a/plugins/bw.js b/plugins/bw.js
@@ -21,14 +21,19 @@ BOOMR.plugins = BOOMR.plugins || {};
 // bytes respectively
 // See https://spreadsheets.google.com/ccc?key=0AplxPyCzmQi6dDRBN2JEd190N1hhV1N5cHQtUVdBMUE&hl=en_GB
 // for a spreadsheet with the details
+//
+// The images were generated with ImageMagic, using random uncompressed data. 
+// As input data (image-3.bin) I used the original images that were encrypted using AES256.
+// The IM command used was : convert -size 618x618 -depth 8 gray:image-3.bin image-3.png
+// Vary the image dimensions to change the filesize. The image dimensions are more or less the square of the desired filesize.
 images=[
-	{ name: "image-0.png", size: 11483, timeout: 1400 },
-	{ name: "image-1.png", size: 40658, timeout: 1200 },
-	{ name: "image-2.png", size: 164897, timeout: 1300 },
-	{ name: "image-3.png", size: 381756, timeout: 1500 },
-	{ name: "image-4.png", size: 1234664, timeout: 1200 },
-	{ name: "image-5.png", size: 4509613, timeout: 1200 },
-	{ name: "image-6.png", size: 9084559, timeout: 1200 }
+	{ name: "image-0.png", size: 11773, timeout: 1400 },
+	{ name: "image-1.png", size: 40836, timeout: 1200 },
+	{ name: "image-2.png", size: 165544, timeout: 1300 },
+	{ name: "image-3.png", size: 382946, timeout: 1500 },
+	{ name: "image-4.png", size: 1236278, timeout: 1200 },
+	{ name: "image-5.png", size: 4511798, timeout: 1200 },
+	{ name: "image-6.png", size: 9092136, timeout: 1200 }
 ];
 
 images.end = images.length;