The Source Code Formatter plugin (hope this is the right place for this) does not provide a progress dialog.
Therefore, with large sources that take 15 seconds or so to complete, the wait can be unnerving. Did it break? Is it done?
I don't know. When it finishes the cursor position is moved to the bottom of the viewport - that's the only way to tell.
I think it would be nice if this plugin provided a progress dialog (percentage, or line by line) and when it finishes, puts the cursor back to the same position and with the viewport aligned as it was.