I am using hungred post thumbnail plugin to show thumbnail for my post. it's showing thumbnail perfectly but when I analyze my website to google pagespeed tool. It shows following error.
The following images are resized in HTML or CSS. Serving scaled images could save 388.8KiB (59% reduction).
I also gets more error but I don't want to discuss them.
But when disable the hungred post thumbnail plugin , serving scaled images disappears. I strongly need this plugin.Can some one suggest me ,what should I do?
Here is my website url with demo posts and images.