[XviD-devel] Fwd: is a bug?

[Radek Czyz]

Michael Militzer wrote:
> Hi all,
> 
> I received this 'bug report' today by private mail. Actually, it's not
> really a bug because it just describes a potential situation where we 
> might do a diamond search twice but without any bad side effects (apart
> from the speed loss).
> 
> I believe the report is correct and it might indeed be possible to 
> slightly speed up extsearch by adding some more checks. The question is
> just whether the additional checks would really make things faster or
> whether the described case(s) are so rare that no speed-up is achieved.
> However, the (0,0) case should be rather frequent...

Hi Michael,

it's being discussed here: 
http://www.xvid.org/modules.php?op=modload&name=phpBB2&file=viewtopic&t=2254

In short, the guy is not exactly right in this particular case - but in 
general yes, extsearch might be a big waste of time because there is no 
checks whether we're doing the same thing twice. This is contrary to 
non-extsearch search, which avoids double-checks beautifully...

Radek

PS. SearchP takes so little time at defaults, that even good speedups 
are hardly worth it :/