(slides from the O'Reilly webcast, see recording here: http://www.oreilly.com/pub/e/3425) The web is becoming increasingly image rich. Between high-resolution mobile screens, Pinterest-style design and big background graphics, the average image payload has more than doubled in the last three years. While visually appealing, these images carry a substantial performance cost, and — if not optimized
![High Performance Images: Beautiful Shouldn't Mean Slow](https://cdn-ak-scissors.b.st-hatena.com/image/square/8e409e3b0f396067420fff5df67642e672007817/height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Fhpi-webinar-150616153517-lva1-app6891-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)