Does Winrar support multiple cores?
- Thread starter Energize
- Start date
The thing is it's not being hdd limited here, it's taking 6mins to extract 5.2GB of data.
The website just mentions compression, which is why I asked here.
On a HDD with an 80MB/s rate it should take less than half that time surely? Copy 4GB of data to ram ~ 50 secs, copy to hdd 50 secs, then copy 1.2gb to ram ~15 secs, then to hdd 15 secs, totalling 130 secs, as opposed to 360.
The website just mentions compression, which is why I asked here.
On a HDD with an 80MB/s rate it should take less than half that time surely? Copy 4GB of data to ram ~ 50 secs, copy to hdd 50 secs, then copy 1.2gb to ram ~15 secs, then to hdd 15 secs, totalling 130 secs, as opposed to 360.
Last edited:
Theoretical speeds are rarely what you get in practice.
If you are extracting from and to the same platter you can as good as half the speed. Additionaly that is theoretical sustained transfer, I am pretty sure an extraction process is a little bit burstier than you might expect.
If you are extracting from and to the same platter you can as good as half the speed. Additionaly that is theoretical sustained transfer, I am pretty sure an extraction process is a little bit burstier than you might expect.
Yeah you will never get theoretical max performance when archiving as isn't just a simple file copy.
One tip is to make sure you are extracting to a different drive (preferably the one with fastest write speed and least fragmentation). If your source and destination drive are the same then obviously this will be very inefficient due to it needing to read and write from a single drive.
The biggest gains from multithreading will come from compressing rather than decompressing anyway as the bottleneck is much more likely to be on the cpu.
One tip is to make sure you are extracting to a different drive (preferably the one with fastest write speed and least fragmentation). If your source and destination drive are the same then obviously this will be very inefficient due to it needing to read and write from a single drive.
The biggest gains from multithreading will come from compressing rather than decompressing anyway as the bottleneck is much more likely to be on the cpu.
Isn't that incredibly inefficient though? It means reading and writing at the same time which significantly reduces throughput.
Soldato
- Joined
- 22 Aug 2005
- Posts
- 9,024
- Location
- Clydebank
Have your archive on a different disk than your temp disk as said above it extracts to a temp location and then
Moves it over
Anyone got any Ssd timings?
There is a compression benchmarker In the about menu
Moves it over
Anyone got any Ssd timings?
There is a compression benchmarker In the about menu
Yes but it works. WinRAR have taken a techical decision which gives the best compromise between performance and reliability.
If you want an extraction tool that uses RAM for temp space then go ahead and write one.
You could copy it in segments, say 100MB, 1s to copy to memory and then 1s to copy to hdd.