https://bugs.kde.org/show_bug.cgi?id=410650
Bug ID: 410650
Summary: 4.3.0-prealpha severe lag with simple manipulation of
vector lines and shapes
Product: krita
Version: nightly build (please specify the git hash!)
Platform: Debian stable
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Layers/Vector
Assignee: krita-bugs-n...@kde.org
Reporter: ahab.greybe...@hotmail.co.uk
Target Milestone: ---
SUMMARY
With the Aug05 krita-4.3.0-prealpha-b7872b8-x86_64.appimage build, there is
severe lag when dragging the bounding box of a vector line/shape. This also
happens with other recent 4.3.0-prealpha appimages.
STEPS TO REPRODUCE
1. Draw a vector line/shape, select it with the Select Shapes tool
2. Grab and drag one of the handles on the bounding box.
OBSERVED RESULT
It takes up to 5 seconds for the bounding box to respond to the cursor movement
and then a little more time for the line/shape to follow the change.
EXPECTED RESULT
The bounding box should follow the cursor with no lag and the line/shape should
follow with very little lag as it does in 4.2.5 and previous versions.
SOFTWARE/OS VERSIONS
Krita
Version: 4.3.0-prealpha (git b7872b8)
Languages: en_GB, en
Hidpi: true
Qt
Version (compiled): 5.12.4
Version (loaded): 5.12.4
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 4.19.0-5-amd64
Pretty Productname: Debian GNU/Linux 10 (buster)
Product Type: debian
Product Version: 10
Hardware Information
GPU Acceleration: auto
Memory: 16039 Mb
Number of Cores: 8
Swap Location: /tmp
ADDITIONAL INFORMATION
GPU acceleration and Instant Preview seem to have no effect on this.
If the handle drag follows a slow complicated path, the lag is greater.
During the drag and slow response, the CPU activity is much greater than it is
than when doing this with version 4.2.5.
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