I know for a fact that Textual can generate an entire frame in less than a 60th of a second. Any lag you see has nothing to do with the choice of language. A TUI just doesn’t require that much number crunching to use a low level language.
I’d be interesting in knowing what platform and terminal you observed the lag, when testing Toad.
I’d be interesting in knowing what platform and terminal you observed the lag, when testing Toad.