Bytes loaded in output window

I keep seeing the following lines in the output when I publish my movies

Downloaded 47926 out of 65338 bytes
Downloaded 49386 out of 65338 bytes
Downloaded 50846 out of 65338 bytes
Downloaded 52306 out of 65338 bytes

now I have 2 external classes which are created with

public var portfolio:Portfolio = new Portfolio();
public var news:News = new News();

does this information automatically get output as text in the output window? I have removed all my traces. How can I access the bytes loaded of the custom classes as these lines only give the document class info.

stage.loaderInfo.bytesLoaded
stage.loaderInfo.bytesTotal