I never noticed the differnce On AES encryption, the iOS devices were faster, but in terms of Qt, I did not observe anything notable.
> In Qt, do you know how costly is the bridge?
It's usually C++/ObjC or C++/JNI, so it's fast.
> how fast is V4 vs _javascript_core?
It's not terrible. And it's getting better all the time. Note that the "proper way" is to do it all in C++ and only use QML for glue code, not to write a lot of app logic in it. (I don't think anyone follows that though)
I understood that the native objects are only communicating with the js via the signal/slot right. How would you compare it with RN?
No, sometimes you do direct API. Like for wake locks, notifications, etc. But 99% of the time, you just roll that into a C++ QObject and expose that to QML, so it's highly re-usable and use signals and slots. So it doesn't matter where you can use it, from QML or C++...
Sent: Saturday, June 02, 2018 at 4:37 AM
From: "Sylvain Pointeau" <sylvain.point...@gmail.com>
To: "Jason H" <jh...@gmx.com>
Cc: "Vlad Stelmahovsky" <vladstelmahov...@gmail.com>, interest <interest@qt-project.org>
Subject: Re: [Interest] QtQuick for mobile - any experience to share?
From: "Sylvain Pointeau" <sylvain.point...@gmail.com>
To: "Jason H" <jh...@gmx.com>
Cc: "Vlad Stelmahovsky" <vladstelmahov...@gmail.com>, interest <interest@qt-project.org>
Subject: Re: [Interest] QtQuick for mobile - any experience to share?
On Wed, 30 May 2018 at 20:38, Sylvain Pointeau <sylvain.point...@gmail.com> wrote:
I have still not made any decision yet, I am doing some testing to get a better idea. Thanks a lot so far to all for your feedback.
I investigated into React Native, as I know Qt quick by reading a lot about it and trying time to time through the years.
RN has 3 parts: the js, the native and the bridge.
the native is specific for a plateform, objective c for ios and java for android
the js is with _javascript_core but without the jit on ios
the bridge is basically a serialisation, I read that this is the most costly.
the js and the native are asynchrone so every call between them must be returned by a callback or with a future
so if I need something in my app that requires something special, long calculation, threads, queued database writes, it will probably require the native and I will have to write it for each platform.
I have some pain to see how fast is the js, I also heard that Android is much slower than ios. Did you observe that with Qt?
In Qt, do you know how costly is the bridge? how fast is V4 vs _javascript_core? I understood that the native objects are only communicating with the js via the signal/slot right. How would you compare it with RN?
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