XCA 2.5.0 & 2.6.0 very slow

[JBau32]

Most likely same problem as #533

Looking at the process activity, I see that it constantly spams the Windows Registry for Time zones. (QDateTime fromString)
Tracing it further it is due to pki_x509::bg_color/pki_base::bg_color which are being called a lot.
Temporarily removing that function using a debugger has lead to improved responsiveness and no more constant freezing.
There still is some stalls/freezes but not anytime i hover or select a certificate.

OS: Windows 11

[JBau32]

Found related QT6 bug: https://bugreports.qt.io/browse/QTBUG-120285

[chris2511]

On my Windows 11, XCA works pretty fast.
Even when running inside a virtual machine hosted on an old and slow linux-intel-I5.
If QT6 is the culprit, please try the QT-5.15 action-build of XCA-2.6.0

[JBau32]

It gets significantly slower if you add 200-500 certificates.

And yes, just tried, qt5 variant is unaffected.
Qt6 seems to have fixed this already on a later 6.6 patch, xca release uses 6.6.0.

[JBau32]

Unfortunately the qt5 variant seems overall slower.
So manually patching out pki_x509::bg_color/pki_base::bg_color functions on qt6 variant achieves the best results.
Nested RootCA + 200 sub certificates are a big slowdown

[chris2511]

Looks like selecting Don't colorize expired certificates in the options dialog also speeds up XCA without patching. The latest 6.6.2 QT release is still notably slower when colorizing expired certificates.

[JBau32]

Good to know!
That option will be my go-to workaround for now till QT devs have resolved that issue.

[WRW001]

Using the latest 6.6.3 QT release will resolve this issue. You can have expired certificates colorized without slowing XCA down. The CI&DI currently configuration can't build Windows binaries using QT 6.0.X, so there will be no PRs. You can make Windows binaries by yourself.
#533

[GiladHi]

Any chance of a new release / build with QT 6.3.3? The only issue I have with the latest version is the speed...

[WRW001]

Any chance of a new release / build with QT 6.3.3? The only issue I have with the latest version is the speed...

https://github.com/WRW001/xca/releases

[GiladHi]

Thanks for the new version and the quick reply! 😎

[GiladHi]

Seems like Google Chrome is blocking the downloading of this build... Maybe I should wait for the next official version.