Unraring a large file slows down

Neil79 · 23 Nov 2010 at 10:19

Is this hardware related or normal? , when unraring a large rar file say 800mb+ to start of with it's fast. However the longer it unrar's the slower it gets , by the end of it ending up at 35 mb/s. This happened on my old hard drive and this SSD. I was expecting a constant speed

7ZIP <-

Neil79 · 24 Nov 2010 at 13:27

Useless buggers , i found out myself

http://www.suggestafix.com/index.php?showtopic=32749

Sounds normal to me. It's much slower then XP/Vista's built in compression...But it does a better job in compressing. You'll have to decide which is the lesser of the two evils

Toughnoodle · 24 Nov 2010 at 14:07

I was thinking it might be down to disk caching, but then I saw you've got 8GB RAM. I don't think that'll affect writing though. Windows is paranoid by default about power loss and uncommited writes.

DragonQ · 24 Nov 2010 at 14:21

I see this often too. Have you tried using the extract command rather than dragging & dropping? I say that cos dragging & dropping has a tendency of being slower as well as freezing Explorer and 7-Zip itself (probably both due to poor coding in Windows).

Even copying really large files (say 30 GB) I can notice the Windows speed indicator dropping slowly throughout the process - it could be that as the data is so large it spans several "orbits" of the platter so as it's getting further and further towards the edge of the platter, it slows down more and more.

SoildSnake · 24 Nov 2010 at 16:00

I think this is linked with spurt times of the drive; whenever coping even a few GB file; it zooms past at first the slows down; is that not the same thing hear?