Re: [UFRaw-Devel] thumbnailer speedup

[Udi F. <udi...@gm...>]

> [3|zap@zap|~]time for x in 1 2 3 4 5 6 7 8 9 10; do convert 1.jpg
> 2.jpg; done
>
> real    0m12.831s
> user    0m11.512s
> sys     0m1.209s

This is cheating. convert understands that it has nothing to do and it
simply copies the input to the output.

This is a more realistic test:

$ time for ((x=0; x<100; x++)); do ufraw-batch --embedded-image
tmp/dsc_0113.nef --overwrite --size=100 --silent --out-type=jpeg; done

real	0m13.871s
user	0m12.737s
sys	0m0.600s

$ time for ((x=0; x<100; x++)); do ufraw-batch --embedded-image
tmp/dsc_0113.nef --overwrite --size=100 --silent --out-type=png; done

real	0m14.247s
user	0m13.345s
sys	0m0.524s

I don't remember the size gnome uses. --size=100 should be the right
order of magnitude. In any case, the difference is negligible. The
advantage of the jpeg output is that the file is much smaller, 4K
instead of 16K. But if I'm correct and Gnome anyway converts and saves
it as png, then it is better to generate the png right away.

Udi