Multithreading: Where is Blender slow?

[silex]

General multithreading feedback

As more and more hardware is moving towards multithreading I found couple places where Blender could be improved regarding performance. I know that not every operation can be parallelised, but nevertheless I want to share my feedback. Firtst example is saving and opening compressed .blend files (when compression is enabled in preferences) - this issue might be somewhat overlooked. Compression is great as it saves a lot of diskspace but it’s very annoing when user needs to wait for it to do i…

I would add two things:

• object syncronisation / initialisation during render pre-processing.
• cloth simulation baking

PS:
.blend file compression is in development already:
https://developer.blender.org/D5799