unzip parallel, 3x faster than 7zip

Jay Norwood jayn at prismnet.com
Fri Apr 6 15:32:11 PDT 2012


On Friday, 6 April 2012 at 14:55:14 UTC, Sean Cavanaugh wrote:
>
> If you delete a directory containing several hundred thousand 
> directories (each with 4-5 files inside, don't ask), you can 
> see windows freeze for long periods (10+seconds) of time until 
> it is finished, which affects everything up to and including 
> the audio mixing (it starts looping etc).

Yeah, I saw posts by people doing video complaining about such 
things.  One good suggestion was to create may small volumes for 
separate projects and just do a fast format on them rather than 
trying to delete folders.

I got procmon to see what is going on.  Win7 has doing indexing 
and thumbnails, and there was some virus checker going on, but 
you can get rid of those. Still, most of the problem just boils 
down to the duration of the delete on close being proportional to 
the size of the file, and apparently related to the access times 
of the disk.  I sometimes see .25 sec duration for a single file  
during the close of the delete operations on the hard drive.

I've been using an intel 510 series 120GB drive for recording 
concerts. It is hooked up with an ineo usb3 adaptor to the front 
panel port of an rme ufx recorder.  The laptop is just used as a 
controller ... the ufx does all the mixing and recording to the 
hard drive.


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