Re: Unresolved issues

> (In fact, it might be perfectly fine to have just a *single* cache, which 
> is keyed on the dirname of the pathname: if the dirname changes, just 
> throw the cache away, and read it in from all the subdirectories leading 
> to that directory - you'd still re-read stuff, but all the common cases 
> will walk the directory structure in a nice pattern, so you'd have a very 
> simple cache that actually gets good cache hit behaviour)

>>   One thing that might be tricky is what should be done while making a
>>   merge or checking out from a tree.  Ideally, the information should be
>>   read from the tree that is being extracted, but that would make the
>>   code structure a little bit, eh, "interesting".
>
> No, that would be pretty horrid. So just tell everybody that it's based on 
> the working tree. I don't think it's likely to be a problem in practice.