Musescore high usage of cpu

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benjibasson
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Musescore high usage of cpu

Post#1 by benjibasson » 17 Apr 2025, 20:26

Hi
MuseScore 4.5.1.250800848 on Porteus 5.01 uses about 25% CPU even when idle, even without any interaction or playback. This is much higher than MuseScore 3.6.2, which uses around 0-1% CPU when idle.

Steps to Reproduce:
Start MuseScore 4.
Run top or another system monitor to observe CPU usage.
Expected Behavior:
MuseScore should use little to no CPU when idle.

Actual Behavior:
MuseScore uses approximately 25% CPU ( always 1 core/4 at 100% even when idle, which seems unnecessary and leads to battery drain. between On session over 8 and always
Image

System Information:
OS: Porteus 5.01 (64-bit)
CPU: Intel® Core™ i5-4200M CPU @ 2.50GHz
RAM: 7.7 GiB
GPU: Intel® HD Graphics 4600
MuseScore Version: 4.4.5 (AppImage)
Additional Information:
This issue is specific to MuseScore 4, and MuseScore 3.6.2 does not exhibit this behavior on the same system.


when the bug occure I got
https://pastebin.com/VhxTV7Jk


when musescore works perfect I got
https://pastebin.com/WJyUSP9x

what are difference between both logs?