Performance Testing News for March 24, 2014

Google Web Performance Team Improves YouTube page load by 10%

Google’s web performance team is continuing to speed up the web. This time they managed to improve YouTube. The team has rolled out a new image format called WebP. WebP provides lossless and lossy compression for images on the web. Their lossless images are 26% smaller in size compared to PNGs while their lossy images are 25-34% smaller in size compared to JPEG images at equivalent SSIM index. A few months ago, the developers added animated WebP images to Chrome, making WebP the first unified format that can address the key use cases of JPEG, PNG and GIF files.

Last year, Google Play replaced png images with lossless WebP. By replacing the PNG to lossless WebP the image size was reduced by 35%. Thumbnails in YouTube are also being changed with WebP. The results are indicating up to a 10% reduction in page load time. Where’s the big picture? For starters, WebP has been able to save tens of terabytes every day. Users are having an easier time navigating the website thanks to faster page load times and fewer bytes counted against metered data plans. Sites that aren't currently serving WebP can use Chrome’s Data Compression Proxy. The proxy transcodes images to WebP on the fly in order to deliver image compression of over 60%.

To find out more, visit the WebP Developers site.