Performance: late previous-playlist load

[Nanno Langstraat]

Nikolaj Hald Nielsen wrote:
> The _right_ solution for this, I think, is to expand on the proxy
> loading pattern that is already used in some places (ampache tracks
> for instance) and use this for loading _all_ types of tracks. What it
> basically does is load an empty proxy track to the playlist, and then
> asynchronously  convert each track to the real one as data becomes
> available.
>   

OK, I have written some code that loads the playlist asynchronously in 
small batches after the rest of Amarok has started.

It doesn't fill the playlist with proxy entries beforehand, but such 
niceties can be made later based on this code.

I tried to push this to a separate branch in the main git repository, 
for people to try it out, but that seems to be disallowed?

I'm pretty comfortable with this change, but probably too risky for 2.3.1?

    Cheers,
    Nanno