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Have you tried using an ISO instead of a CSO? AFAIK CSO's tend to have longer
loading times / a little lag because they have to be decompressed on the fly
compared to the uncompressed ISO files. Some games are more affected by this
compression than other less demanding games.
I have no point of reference though, I never use CSOs; I always decompress them
to ISOs before putting them in my PSP. Sure, it takes a little more space, but
I'd rather have fluid gameplay than a laggy experience.
Original comment by zygi...@gmail.com
on 18 Nov 2011 at 4:18
@ zygi...
Well, I have re-ripped my own UMD lumines game to get an new iso (out-ruling
that the cso has become corrupted or somthing like that). The new iso does not
have the horrible lagging (it's really not alittle lag when I use the cso)
issues I have mentioned earlier when using NP9660 or M33 UMD iso driver.
But how do you explain that Lumines works so much better with the Inferno UMD
iso driver, even when the game is in cso format? Although there some slight
(almost negligible) lags between music/levels/scenes changes when you have
scored certain score in the game if Inferno driver is enabled. So I think there
are some issues with the NP9660 and M33 UMD drivers, although many people
recommend to use the NP9660 umd iso driver since it's supposed to be more
compatible, e.g. preventing freezes in certain games. I guess I will use the
Inferno driver 'till I get freezes in certain games.
Original comment by cmtan...@gmail.com
on 18 Nov 2011 at 6:38
It all depends on the optimalisation fo the plugins. I'll make an example to
compare:
WinZip creates *.zip archives with a moderate level of compression. 7zip does
the same FASTER or with BETTER compression since it enables you to choose a
bigger dictionary. Just like archivizers like WinZip, WinRar, 7zip, Uharc, etc.
have diffirent compression and decompression times - the same goes for iso
drivers on the PSP.
You could say that Inferno has better performance at the cost of compatibility.
Just like some games work better on SonyNP9660 other games work better on
Inferno. So far I havent found a game that would require M-33 driver to work or
perform better than on the other drivers.
Original comment by piotrekhenry
on 18 Nov 2011 at 8:30
CSO are always like that since it is compressed also Loading times are always
longer since you need to decompress the data before loading it. The extra time
might be or not humanly noticeable.
Original comment by chronosx...@gmail.com
on 19 Nov 2011 at 7:10
The two posts above explain a lot already, but to add:
As for explaining why Lumines work fast in CSO format using the Inferno driver,
this is purely speculation on my part but go back to what I said: Some games
are more affected by compression than other games. There has been issues with
the GTA Series' Vice City and Liberty City Stories that they become almost
unplayable when being in CSO format. As of this time I don't know if they
fixed that, but it gives an example of what I said.
Some games read data more from the disc (and in this case, the image file) and
as been said, if it has to, it will, and if the data is compressed, the data
has to be decompressed before it can be loaded. If the data is small enough the
performance issues will be negligible, and will be a difference of only
milliseconds to a couple, during loading screens. But if this data is large,
and has to be loaded not during a loading screen, performance will take a hit.
The data that had to be loaded at a specific speed at that time has been
delayed because it was being decompressed first.
Original comment by zygi...@gmail.com
on 20 Nov 2011 at 6:25
@ Zygi @ examplex @ Piotrekh
Thanks for explaining why it's possible that there's horrible lagging in
Lumines when using NP9660 or M33 umd iso driver. I have done some other tests
such as tweaking the cache in the CFW, and the larger cache size doesn't effect
or reduce the lagging at all. The only solution now to me is really using the
Inferno umd iso driver, because the lagging in the game is really minimal,
almost non-existant. I guess it's a decent solution for now, if it's not
possible to make NP9660 or M33 driver load faster when it comes to cso images.
I don't know who wrote the NP9660 or m33 drivers, or whether the developement
of both drivers have been stopped then, but I guess, the only solution is the
Inferno umd iso driver if the development has been stopped.
Anyway, thanks!
Original comment by cmtan...@gmail.com
on 20 Nov 2011 at 1:51
Using Inferno is not asolution. Your best option is DEWCOMPRESSING the *.cso
into a *.iso file. Then whatever ISO driver you will use wont lag at all.
Original comment by piotrekhenry
on 20 Nov 2011 at 6:49
If you insist on using .cso files, try using a higher clock speed when playing
laggy games. But as ^ says your first and most practical solution is
decompressing your .cso back to an .iso.
Original comment by zygi...@gmail.com
on 21 Nov 2011 at 4:36
Original comment by piotrekhenry
on 23 Jan 2015 at 6:09
Original issue reported on code.google.com by
cmtan...@gmail.com
on 18 Nov 2011 at 11:52