Old (3.4.4) score opens 2 times longer in 4.3 (than in 4.0-4.1.1)

[DmitryArefiev]

Issue type

Opening/saving issue

Steps to reproduce

1. Open Mvt.4_Beethoven__Symphony_No._9__Op._125.zip in 4.1.1 and measure time
2. Open Mvt.4_Beethoven__Symphony_No._9__Op._125.zip in 4.3 and measure time

In 4.0-4.1.1 it takes ~11sec In 4.2 - 4.4 it takes ~35sec

---

New results after #21803

In 4.1.1 it takes ~12sec In 4.4 it takes ~36sec In PR build it takes ~25sec

MuseScore Version

4.3

Regression

Yes, this used to work in MuseScore 4.1.1

Operating system

Windows 11

Additional context

#21571

[mathesoncalum]

There are a handful of commits that have contributed to the increased load times, though #17983 and #19659 seem to have had the most significant effect.

Current Master:

After reverting the changes from these PRs:

Looking into potential optimizations now.

[DmitryArefiev]

This was improved after #21803

The new results added to description (Summary is also updated)

[bkunda]

@DmitryArefiev pls check to see if this is still reproducible (also in 4.3.1).

[DmitryArefiev]

Yes, the same result: Old (3.4.4) score opens 2 times longer in 4.3.1 and master comparing with 4.1.1

But I think we can bump it to 4.5 for now. Please change if don't agree