[TxMt] TM lags when switching

I am pretty sure I just pinned this down to TM. If I work in TM, save, then command-tab to a browser, there is significant lag from the time it will switch to the browser, or, at times, even bring up the application tab switcher.

If I do not save, the toggle is fast, so it seems to be something to do with leaving TM, where it is not letting me leave as fast as other apps do.

I have tried toggling back and forth between other apps, and the behavior is speedy. Any idea what is going on, and how to solve it? These are simple files, single files, that have a hundred lines or so in them, nothing complicated at all.