Hi,
Le dimanche 12 juillet 2009 ￜ 13:43 -0700, Guy Harris a ￜcrit :
> On Jul 12, 2009, at 12:48 PM, Jakub Zawadzki wrote:
>
> > This patch (Proof of Concept) removes allocating memory for columns
> > data,
> > and makes them 'dynamic' (packets redissected when column data needed)
>
> That should make changing the time format, for example, *extremely*
> fast - it should just have to redisplay all the rows that are
> currently on the screen, it won't have to recompute all the column
> strings. (I.e., it should happen in constant time, not in linear time.)
>
> > I haven't seen any visible lags while scrolling,
>
>
> Try scrolling backwards through a large gzipped file.
>
> (That doesn't say this is the wrong thing to do - I've been advocating
> this for a while, and made a version of the GTK 1.2[.x] GtkCList with
> "dynamic" column data and prototyped the same thing - it says we need
> to make random access to gzipped files faster.)
What about saving the uncompressed data in a temporary file?
It's mostly already done with the capture ability:
if (gzip or bzip2 or whatever)
if (!fork())
exec(unzip, file, stdout);
capture_from_stdin();
It would kill many birds with on stone:
- solve the problem with random access
- may work with file > 2GBytes (don't know if we can link a 32 bits only
gzip lib and use only memory uncompress with a large files executable
though).
- faster both for filtering and when loading a file (unzip would be done
on a different core).
The drawback of course is the disk usage but it shouldn't matter for
small files and for big file wireshark is slow and next to unusable.
Didier
