[Interest] Qt 5.8 performance regression in android application

[Tomas Konir]

Hi

You wrote, that you have app which uses internet.
If you are using many http requests, you may be affected with regression in
network access manager, which computes DH keys for each http request (even
though you are doing only plain http).
DH computation is very CPU intensive and for me causes massive slowdown on
android and noticeably slowdown on PC (http intesive application).
This is fixed in upcoming 5.9.

Tom


2017-05-11 9:45 GMT+02:00 Лагнер, Сергей <developer at lagner.ru>:

> Hello all.
>
> We are going to upgrade Qt from 5.6 to 5.8 for our android application.
> I've got the build with Qt 5.8 and it much slower.
>
> First of all I mean animations.
> We use Qml StackView and we animate transitions between pages.
> With 5.6 this animations are smooth, but with 5.8 they are laggy.
> It freezes 3 or 4 times each transition.
>
> One more example, we have a photo gallery page. All photos come from the
> internet.
> Once transition to the page is done, Qt 5.6 already has a number of photos
> to show.
> 5.8 only shows first picture after a while.
>
> I know that my problem is not concrete enough, but maybe you know smth
> that
> was changed between 5.6 and 5.8 that is very important to check or modify
> to get better performance.
>
> We use QtQuickCompiler if it's matter.
>
>
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>
>


-- 
Tomas Konir
Czech Republic
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