https://bugs.kde.org/show_bug.cgi?id=473311
Bug ID: 473311
Summary: API Krita.instance().resources("preset") is really
slow
Classification: Applications
Product: krita
Version: nightly build (please specify the git hash!)
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Scripting
Assignee: krita-bugs-n...@kde.org
Reporter: grum...@grum.fr
Target Milestone: ---
SUMMARY
When using method Krita.instance().resources("preset") for the first time in a
Krita session, execution is pretty slow.
STEPS TO REPRODUCE
--> Ensure no plugin is active
1. Open Scripter
2. Execute following script
```
import time
ts=time.time()
l = Krita.instance().resources("preset")
print(len(l), time.time() - ts)
```
OBSERVED RESULT
I have 1058 presets on my DEV computer
-> First execution duration is ~3.932s
-> Next execution duration are ~0.019s
EXPECTED RESULT
For users with a lot of presets (I'm pretty sure to not be the only one :-)) a
plugin that call this method will freeze Krita for a 'long' duration (on my
side, at plugin startup)
Not sure why there's a such difference between first execution and next one,
and if it's really possible or not to fix it.
I suppose the instantiation of 1058 Resources objects is the reason; if yes, in
this case, a solution could be:
- implement Krita.instance().resourceNames("preset")
==> return only an array of String of resources names
- implement Krita.instance().resource("preset", "resourcename")
==> return only one Resource object
SOFTWARE/OS VERSIONS
Krita
Version: 5.2.0-beta1 (git 0447d30)
Qt
Version (compiled): 5.15.7
Version (loaded): 5.15.7
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 5.19.0-45-generic
Pretty Productname: KDE neon 5.27
Product Type: neon
Product Version: 22.04
Desktop: KDE
Appimage build: Yes
Hardware Information
GPU Acceleration: auto
Memory: 64201 Mb
Number of Cores: 24
Swap Location: /tmp
Built for: sse2
Base instruction set: fma3+avx2
Supported instruction sets: fma3+avx2 avx2 fma3+avx avx fma4 fma3+sse4.2
sse4.2 sse4.1 ssse3 sse3 sse2
REMARK
Problem is not relative to 5.2, it also occurs on
- 5.1.5
- 5.3
- 5.0.2 (even if it was faster, ~2.75s to load resources)
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