[Dovecot] More efficient Deleting of a whole folder (or Purging Trash)

[Ed W]

>
> I misunderstood the cause of the slowness then, if it is really true 
> that updating the index is not an important factor.  I don't remember 
> seeing profiling, but since I don't have any myself I'll take your 
> word for it.
>

It always frustrates me to see people speculate on stuff instead of 
getting their stop watch out and trying it

Just get a small shell script to run `touch ${rand_file}` 35,000 times 
and  time it.  Then drop into your shell and do rm -rf on the folder 
(for bonus marks you could purge the disk cache before doing this).  
This gives you a benchmark on your hardware separately to what dovecot 
offers.  Take that number and lets work from there...  Shouldn't take 
too long to do something like this?

Ed W