I recently found out that the `src` attribute of an image allows you to put raw base 64 image data straight into it. Am i right in supposing this is technically more efficient than a separate image file as additional requests for the images don't have to be made? Or is the overhead so small that it's not worth it?

Also, assuming i ended up doing this, what would be the best way to get that raw data? (out of, say, an image i whipped up in paint?)