How to log the Frame Rate that is displayed

[legoman2015]

In the menu to display the Frame Rate:

Display-> Heads Up Display -> Frame Rate

Is there a way to log the Frame Rate to a file?  

[tony.su]

I guess you should make an api plug-in for it.

[Anonymous]

Not sure how you would you do that so that the frame rate goes to the API?

[tony.su]

I guess you can got this from API and then export it into a file.

But I don't know how to do it.