True, there is no caching. But that's still a technique worthy to use when they are very small (hundreds of bytes), or when the images should never be cached (e

True, there is no caching. But that's still a technique worthy to use when they are very small (hundreds of bytes), or when the images should never be cached (eg. low-resolution real time status graphs). In these cases, they reduce the amount of data on the wire (no extra HTTP requests) and reduce page load time.