FORUM - Optimizing needed on OSX


Optimizing needed on OSX
by MrScrith     [ 13 July 2007 - 3:03 pm ]
When running the ebook reader in windowed mode on OSX it regularly goes up to 35% and 40% CPU usage, this is on a Macbook Pro 2.33Ghz with 2gb ram. This causes the cooling fans to go on full speed. Both of these things seriously drains the battery making it impractical for running on a laptop without being plugged in.

While this is a great app I won't continue running it, to much of a drain on the battery.
by Aidan    [ 13 July 2007 - 3:24 pm ]
Will fix this up soon and post a reply here when its ready - should be within the next couple of days.
by Aidan    [ 25 July 2007 - 3:03 am ]
A question - is this just during scrolling text mode, or always.

If its just during scrolling text mode, there's an option to reduce processing power in the main menu - try it.
by JRM    [ 22 November 2007 - 4:38 am ]
Great program, but I have this same problem. It uses up an entire core - over 50% CPU usage - whether it's scrolling or not. If I disable the scrolling power saving feature, it uses ~80%. This on a 2.2GHz Macbook Pro with 2GB RAM.

I'd be most grateful if this could be corrected because it prevents me from using it on-the-go. Battery life halves with the reader running!
by Aidan    [ 22 November 2007 - 5:03 am ]
Ok - I'll look into it and post here when I have some updates.
by Aidan    [ 26 November 2007 - 10:28 am ]
This problem should be fixed up in version 1.80.
by JRM    [ 27 November 2007 - 6:07 am ]
Thanks for the continued support, Aidan. Unfortunately, although the problem is improved, it hasn't been solved. CPU usage is now ~45% while displaying text and about 23% while in the menus.
by Aidan    [ 27 November 2007 - 6:14 am ]
What system are you running on ? What's your Mac, and is it Tiger or Leopard. Do you have an new Intel Mac or the older PowerPC ones ?

The new version runs at about 14% to 23% depending on the resolution on my MacBook.
by MrScrith    [ 27 November 2007 - 9:10 am ]
Haven't checked since upgrading to Leopard, but the problem I was having was in Tiger 10.4.9, Macbook Pro 2.33, 2gb ram, nothing much special about what software was being run at the time, mostly mail.app, firefox, safari, iTunes, cal, and journler, mostly using iStat Pro to check usage and temps.

When I get a chance I'll get the latest version and see how it runs under Leopard.

Thank you for your time!
by JRM    [ 28 November 2007 - 5:35 am ]
I'm running Leopard 10.5.1 on a Macbook Pro 2.2GHz Core 2 Duo with 2GB RAM. I realise now that I was mistaken before: the ~50% CPU usage was per core. So in fact, the reader uses 23% CPU at native 1440x900x32bit and 12% at 800x600x16. The text looks terrible at non-native resolutions. Although the usage situation is not as bad as I initially thought, it's still bad enough to cause my CPU to jump into "high speed" mode which kills my battery. Is there no way the CPU usage can be reduced when displaying static images? Most of the time this is the case. At least then the CPU would only speed up briefly whenever I turn pages.
by Aidan    [ 28 November 2007 - 8:39 am ]
Ok - hopefully this is all ok now.

Download version 1.81.

Note, if you move the mouse or press any keys then the processing power used is high, but two seconds after your last movement or keyboard, using the non-scrolling text view mode, the processing power should be reduced to practically nothing (1% or less here for me).

Let me know how yous get on please.
by JRM    [ 28 November 2007 - 8:54 am ]
Legendary! I have 4 hrs projected battery life with the reader running! Thanks, Aidan!
by Aidan    [ 28 November 2007 - 8:56 am ]
Thanks to you guys for helping me fix up an obvious defect in the program.

Happy Reading !

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