White background not needed & optimize images more

lib/screenshotHandler.js

@@ -25,8 +25,6 @@ var screenshotHandler = function() {
                 return that.resizeImage(image, width);
             })
 
-            .then(this.addWhiteBackground)
-
             .then(this.toBuffer);
     };
 
@@ -76,44 +74,11 @@ var screenshotHandler = function() {
         return deferred.promise;        
     };
 
-    // If the page doesn't set a bg color, the default PhantomJS one is transparent
-    // When transforming PNG to JPG, transparent pixels become black.
-    // This is why we need to add a transparent background.
-    this.addWhiteBackground = function(image) {
-        var deferred = Q.defer();
-
-        // Create a canvas with the same dimensions as your image:
-        new Jimp(image.bitmap.width, image.bitmap.height, 0xFFFFFF, function(err, canvas){
-            if (err) {
-                debug('Could not create a white canvas');
-                debug(err);
-
-                deferred.reject(err);
-            } else {
-                // Paste original image on top of the canvas
-                canvas.composite(image, 0, 0, function(err, image){
-                    if (err) {
-                        debug('Could not paste image on the white canvas');
-                        debug(err);
-
-                        deferred.reject(err);
-                    } else {
-                        // Now image has a white background...
-                        debug('White background correctly added');
-                        deferred.resolve(image);
-                    }
-                });
-            }
-        });
-
-        return deferred.promise;
-    };
-
 
     this.toBuffer = function(image) {
         var deferred = Q.defer();
 
-        image.quality(90).getBuffer(Jimp.MIME_JPEG, function(err, buffer){
+        image.quality(85).getBuffer(Jimp.MIME_JPEG, function(err, buffer){
             if (err) {
                 debug('Could not save image to buffer');
                 debug(err);