What a speed gain!

Stephan Paukner :: syslog

Thursday, March 5. 2009

What a speed gain!

I complained about my old notebook being too slow at image processing. As I now run a new machine, it’s time to measure the performance increase:

Old system: 1×1.6 GHz CPU, 1 GB RAM
New system: 8×2.67 GHz CPU (by threads), 6 GB RAM
Test file sizes: 11.2–12.5 MB

Task #1: Render 8 RAW images to PPM in multi-parallel
Command line:

for file in *cr2; do
time dcraw $file &
done

Old system time: 1 min 41.1 sec
Old system mem usage: 1 GB (100%)

New system time: 0 min 04.6 sec
New system mem usage: 2 GB (33%)

→ 22× faster

Task #2: Render 8 RAW images to JPEG in multi-parallel
Command line:

for file in *cr2; do
time convert $file $(basename $file .cr2).jpg &
done

Old system time: 5 min 0.0 sec
Old system mem usage: 1 GB (100%)

New system time: 0 min 18.2 sec
New system mem usage: 2.5 GB (42%)

→ 16.5× faster

Hell yeah!

Posted by Stephan Paukner in Information Technology at 20:37 | Comments (0) | Trackback (1)

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Logbook of Stephan Paukner on : What a speed gain!, II

The Cooler Master V10 was finally available and is finally mounted on my CPU. I could thus start my overclocking experiments. My first comparisons with my old notebook already revealed some nice performance gains with the Core i7-920&#8217;s default spe

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