[Interest] Qt 5.12 Beta 3 slows down ext Javascript library (RSA encrypt)

[ekke]

Am 06.11.18 um 06:30 schrieb Tomasz Olszak:
> Still there is a performance regression somewhere and while the C++
> solution is most performant
will try again to find a C++ solution for Android, iOS
>  the cause of this regression can hit other
> parts of Qml stack.
have created bug with example app
https://bugreports.qt.io/browse/QTBUG-71591
> Ekke do you use prebuilt binaries or do you compile them yourself?
sorry, I'm only using prebuilt binaries
... and it's even much work to test my complex mobile apps against 5.10,
5.11, 5.12, QtC 4.7.x, 4.8Beta, all the iOS / Android versions /
devices/ ... ;-)

ekke
>
> If you compile yourself you can bisect and find the cause. Not many
> patches landed in qtdeclarative in 5.11.3:
>
> 4a886753a Accessible: Return StaticText if there is no explicit role set
> 0f0ed2070 At least warn when triggering a rendering limitation
> 614d16d6f Doc: place more importance on not binding to x/y/width/height
> 7f57472e2 Warn, don't crash during nested delivery of mouse or touch presses
> 1ce94fc0f Qt Labs Settings: warn if failed to initialize internal
> QSettings instance
> 7ca32bc41 qmlplugindump: Remove sigsegv handler
> 453a3806a Document that aliases cannot point to attached properties
> 10095542d Fix crash in QQuickAnimatorProxyJob::sceneGraphInitialized()
> 9cb13a422 QQuickItem: document which events are accepted by default
> 074190902 Mark QML captured scope/context loads as having side effects
> f27a16b7b Don't get confused about the grabber during replayDelayedPress
> 3bdb3c1d8 Amend TouchMouse::buttonOnDelayedPressFlickable to test delayed tap
> 934d93b91 YarrJIT: disable MatchResult decoding constructor on 64bit
> ec1fdecef Add QQuickItemPrivate::updateOrAddItemChangeListener()
> 777cd6e9b Add QT_CONFIG(filesystemwatcher) guard for include
> 039a28468 Fix Integrity OS allocator memory attributes
> 4441cefd7 Doc: Remove wrong ';' from Q_PROPERTY example
> 8fd398c9d Prevent PathView's parent stealing mouse grab during double-flick
>
>
> wt., 6 lis 2018 o 06:20 Thiago Macieira <thiago.macieira at intel.com> napisał(a):
>> On Monday, 5 November 2018 11:32:03 PST ekke wrote:
>>> Thanks, Thiago for the hint - that was the first thing I tried, but
>>> couldn't figure out HowTo make it work on Android and iOS.
>>> unfortunately now with 5.12 Beta it slows down by 20x.
>> Then get a 400x improvement by trying the C++ part again. OpenSSL is easy on
>> Android, since you'll have to deploy it anyway alongside your application.
>>
>> On iOS and macOS, you shouldn't use OpenSSL. You should use Apple's API,
>> whatever it is. Please consult Apple's website.
>>
>> --
>> Thiago Macieira - thiago.macieira (AT) intel.com
>>   Software Architect - Intel Open Source Technology Center
>>
>>
>>
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