Here is a general result for research proposed in {T88353}.
The idea is to analyze whether the creation of the normal facedot cache
is still more efficient in single-thread than multi-thread (as indicated
in the code comment).
To test it 2 files were created. On them, the creation of the cache of
normal face dots is distributed in 8 threads.
File 1:
{F10124059}
File 2: `File 1` with modifiers applied.
**Results:**
**High Quality Normals:**
||No facedots|Original values|Patch Single-thread|Patch Multi-thread|
|File 1|1.17ms|1.43ms|1.46ms|1.42ms|
|File 2|3.65ms|3.78ms|3.80ms|3.79ms|
**Default Quality Normals:**
||No facedots|Original values|Patch Single-thread|Patch Multi-thread|
|File 1|1.16ms|1.47ms|1.45ms|1.40ms|
|File 2|3.70ms|3.77ms|3.73ms|3.78ms|
**Conclusion:**
It doesn't get worse anymore, but it doesn't bring a significant improvement either.