Badder performance on Ipod Video than on Sansa e250 ??

[Peterdk]

Hi
I've just bought an Ipod Video 5,5G 30GB. After i smashed my Sansa e250's display.

Well my big question is why it feels like rockbox isn't performing as good on my ipod video, than on my previous player.
Some plugins like Plasma, Rockdoom and Rockboy is lagging alot while there was no problems at all on my sansa ?
Is there any way to fix this ?

Peter, Denmark.

[lights0ut]

Is there any way to fix this ?

Buy a Gigabeat . Does this happen with the current build? and could you be a bit more descriptive of the type of lag you experience? Are you playing high bitrate files while you are messing with the plugins? if you don't have audio playing does performance improve?

[Peterdk]

Yep it happens with the current build . Well it doesn't show the plasma plugin as fast as the e250 did . And if you go to the "mandelbrot" plugin it takes 5+ sec. to zoom or move the picture while it didn't even take a second on the e250. I'm not playing songs or anything.
I was a bit dissapointed when finding out that this expensive player performed worse than the cheap sansa player.
But do you think it's just my player or are every Ipod Video 5,5G ?

Plz help .

[gnu]

It's simply because the Ipod video has a very big screen (=> many pixels) , but a CPU that's not faster than a nano's...
That's why rockbox works on nanos best, and on 5Gs worst.

[bluebrother]

That's why rockbox works on nanos best, and on 5Gs worst.

You forgot the mini -- Rockbox works really well on that Ipod

[Peterdk]

hmm the kinda sucks :S

But even when playing the games in Rockboy without scalling to fullscreen, it is still slower .

Doesn't anyone know a fix for this ?

[lights0ut]

From: http://www.rockbox.org/twiki/bin/view/Main/DeviceChart#Apple_units

iPod 5G - PP5021 (dual ARM7) 32 KHz - 80 MHz   320px by 240px = 76800px
Sansa e2xxPortalPlayer 5024 dual core 100 MHz`176px by 220px= 38720px

So with the sansa you are using about 1.25x the processing speed to draw about half of the screen size compared to the iPod. It's not just your iPod, mines slow too.
AFAIK rockboy isn't fully functional on the 5G yet.

I was a bit dissapointed when finding out that this expensive player performed worse than the cheap sansa player.

That's apple for ya, they seem to be very "style over substance" these days

[Peterdk]

But isn't there any differences in the CPU speed on the 5.5 G Ipod ?

[lights0ut]

But isn't there any differences in the CPU speed on the 5.5 G Ipod ?

you mean between the 5G and 5.5G iPods? I believe they use the same portalplayer chip for the CPU, so the speed would be the same.

[saratoga]

I think the Sansa CPU runs at 75MHz.  Could someone confirm?  That page should be fixed.

[senab]

Well this is true, except the iPod has the Broadcom chip. If that can be utilised properly then the performance of the iPod *should* increase greatly. The only problem is there are no public documents detailing how to use it.

[Peterdk]

That's a shame. hmm can't anyone get in touch with the producer or something, like with the Sansa player ?

[saratoga]

That's a shame. hmm can't anyone get in touch with the producer or something, like with the Sansa player ?

Broadcom doesn't give out details for their hardware.

[Bagder]

I think the Sansa CPU runs at 75MHz.  Could someone confirm?  That page should be fixed.

I think we use the same speed in Rockbox on all PP targets, it's just that some of the PP chips have been speced to work with higher frequencies.