QtCreator experiences performance degradation with each new release

Andy314

Hi Team,
I like Qt Creator, but some behaviors are highly annoying.

In the Form Editor, clicking a button to connect a slot and create or locate a member function takes about 45 seconds. It used to take only 3 seconds in older versions. Furthermore, this only works properly if the CPP file is already open. If it was not open in the editor, the cursor just jumps to the end of the file. Then you have to trigger the action all over again.

This is incredibly frustrating and wastes valuable time. Is there any way you can speed this up?

Thanks in advance,
Andreas

SGaist

Hi,

You need to provide more details:

Qt Creator version
Qt version
Compiler version
OS (if Linux, distribution)

cristian-adam

@SGaist You forgot the build system used by the project. Or if a project is remote, but I guess this was not working before.

Lastly the computer used for doing the work ...

At https://www.qt.io/blog/qt-creator-20-faster-clangd I show that at least one component of Qt Creator is getting faster :)

Andy314

@SGaist her the information.

Window 11 Pro - Version 25H2 (Build 26200,8875)
QtCreator 20.0.0
Qt 6.7.3 or Qt 5.15.2 (its independet of it)
MSVC 2019

I measured again - 35 seconds Windows Kit - 49 sec. Andoid 6.12.0 arm 64-v8a

hskoglund

Could you also specify your version of Windows?
To see it: Windows Key + R, winver
Look for the line beginning with "Version ..."

Andy314

@hskoglund it is

Window 11 Pro
Version 25H2 (Build 26200,8875)
(full power Hardware - that not the reason)

cristian-adam

You should try running Qt Creator with -tcs (temporary clean settings) or a different settings path, and see how it fares.

There have been cases of weird behavior with qtcreator.ini being really big.

On Windows the usual:

antivirus off/on
network drive, which has slow disk access

cristian-adam

Lastly, try without the Android plugin. There were reports that the Android plugin would do device check every now an then and things would be horribly slow.

We all love a nice mystery. Thank you for reporting this! 🍿

Andy314

A question: How is this integrated. Uses it the full codemodel for the project (I have 140000 LOC) or looks it only the corrosponding CPP-File what should be fast ?
I will check the other hints.