No problem. If you are having edit response issues (i.e. its taking a long time to save a post with media in it) that could be because the extraction setting is on and the detination site is being unresponsive. Normally, the extraction method is pretty unnoticable, however in the event that you post a media link that has it on, it will try to download the destination page to extract information from it (i.e. the title, run check to see if embedding is allowed, etc...). If the destination server is taking its own sweet time and/or you have A LOT of media in a single post, well... you get the picture
You can always turn that feature off, though many other features and definitions may require it and in normal operation, it seldom causes a problem.