[KimDaBa] About the renaming issue

[Jesper K. Pedersen]

"Dario Spagnolo" <spada at zaup.org> writes:

| Various options :
| 
|  - the start-up checksum could be enabled by default but possible to
| disable it via an option. This way, people with huge albums would disable
| it and only run it when they really need it.
|  - My PIII 650 laptop with a very slow disk performs md5 checksums at
| 14,5Mb/s. If we only compute the md5 checksum on the first 10kb and the
| last 10kb, this would allow me to process 10,000 images in more or less
| 15 seconds. We might also be able to only take the first 5kb and the last
| 5kb, which would allow me to process 10,000 images in 7,5 seconds.
| 
| It has to be said that the it's, generally speaking, rather unlikely that
| someone will store 10,000 images on a slow and therefore small hard disk
| (mine is 10Gb). So we can assume that large albums will be stored on
| relatively fast hard disks, let's say at least 25Mb/s (the fastest hard
| disk I can test hdparm on, which is already 2 years old, gets 38Mb/s, so
| 25 is a low profile situation). This would bring the best option down to 4
| seconds.
I'm still not sure your math work out correct, there is a small but
existing time spent on opening/closing the file. I'm sure you will see that
this time sums up to a real time you can feel if you do it say 10.000 times.

Cheers
Jesper.