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Input-Lag with Tiling Window Managers

There is a test about different DEs and their impact on input lag.
I’m currently thinking about switching to Qtile (or another tiling window manager), and am therefore wondering, how that might impact my input lag.
The cited test states:

The rule of thumb is : if the DE/Compositor supports fullscreen unredirection and the app/game properly does the fullscreen OR if you can disable the compositor, and nothing is messing with the input devices you are good to go apparently.

In most WMs, I can certainly disable compostion (I don’t even need to enable it in the first place), but what about the other stuff? Qtile for example, is written in Python. Is this an issue?