[felipefar]

> I've had more problems with Widgets, especially when doing a lot of animations (even just scrolling big text views) on a 4K display on MacOS, but maybe I'm thinking graphics and not input lag.

There's two things to consider when comparing rendering performance: throughput and latency. Throughput, or how much FPS the engine can sustain, is much better in QML since it's leveraging the GPU, but latency it's very platform-dependent. Mac is actually the one where QML does best in terms of latency (and by that I believe it approaches the latency of Qt Widgets), since it's synchronizing with the VBlank signal provided by CVDisplayLink. On Windows and Android the situation is worse.

[throwup238]

Sidenote: Have you seen the new TextEdit improvements in Qt 6.7? I'm curious if that bridges the gap that you had when you started working on your app. My app is also text editing heavy so I'm hoping it's a big improvement.

[felipefar]

I saw them, they are a very small step in what I believe is the right direction, since you can use a custom textDocument. Anyway what I think would be useful is to jailbreak the QML API. Make the QML C++ API publicly available. Let us derive from the controls, manipulate and customize them with C++, as the Qt team devs themselves do.