+ Reply
Page 1 of 2 12 LastLast
Results 1 to 20 of 25

Your favorite Apple, iPhone, iPad, iOS, Jailbreak, and Cydia site.


Thread: French Developer Reports Significant Speed Bump Under Snow Leopard

is a discussion within the

Mac News

forums, a part of the

General Apple/Mac

section;
Christophe Ducommun, the developer of video software MovieGate has found, as reported by the French website HardMac , that he was able to go from 104 frames per second encoding
...
  1. #1
    MMi Staff Writer Paul Daniel Ash's Avatar
    Join Date
    Aug 2009
    Location
    Union Square, Somerville, Mass.
    Posts
    919
    Thanks
    6
    Thanked 995 Times in 401 Posts

    Default French Developer Reports Significant Speed Bump Under Snow Leopard


    Christophe Ducommun, the developer of video software MovieGate has found, as reported by the French website HardMac, that he was able to go from 104 frames per second encoding under Leopard to 150 frames per second under Snow Leopard making use of Grand Central Dispatch and OpenCL, two new technologies used in the current release.

    Grand Central Dispatch is a way to more efficiently make use of multiple-core processors. Ordinarily, a programmer would have to write explicit code for dual-core and quad-core CPUs, but GCD handles this for the developer. OpenCL allows programs to take advantage of the video card's graphics processing unit (GPU), normally used for rendering, to share the load with the CPU.

    In addition, Ducommun found that MPEG-2 encoding went from 100% to 130% CPU utilization on a quad-core Mac Pro - showing GCD taking advantage of his multi-core CPU - and decoding dropped CPU utilization from 165% to 70%, which indicated that the work had been offloaded to the GPU.

    This is one of the first examples of a developer realizing significant performance improvements merely by turning on support for an existing feature in Snow Leopard. We should see more such news in the weeks and months to come.
    Last edited by Paul Daniel Ash; 09-18-2009 at 11:33 AM. Reason: dropped a comma

  2. #2
    My iPhone is a Part of Me tudtran's Avatar
    Join Date
    Sep 2007
    Location
    Foco, Colorado
    Posts
    999
    Thanks
    4
    Thanked 36 Times in 28 Posts

    Really???? I have noticed my divx and vlc players been skipping a lot lately in full screen mode.

  3. #3
    Green Apple zoolander369's Avatar
    Join Date
    Feb 2008
    Location
    Atlanta
    Posts
    98
    Thanks
    6
    Thanked 4 Times in 4 Posts

    I've noticed the speed bump big time... except with emptying the trash. The trash takes FOREVER to empty!!! WTF?

  4. #4
    What's Jailbreak?
    Join Date
    Feb 2009
    Posts
    8
    Thanks
    0
    Thanked 0 Times in 0 Posts

    @tudtran: The app needs to be optimized to use the new APIs before you see a difference. Give the developers some time and wait for a few software updates and you'll eventually see a difference

  5. #5
    Livin the iPhone Life TheOrioles33's Avatar
    Join Date
    Jul 2007
    Posts
    1,001
    Thanks
    43
    Thanked 66 Times in 52 Posts

    LOL! I thought the title of this topic meant a bad thing as in "speed bump" in the road would slow you down!

  6. #6
    Super Sweet Moderator thetoothfairy's Avatar
    Join Date
    Aug 2007
    Location
    In Michigan And Florida
    Posts
    6,523
    Thanks
    3,595
    Thanked 999 Times in 563 Posts

    ^ R U 4 Real?

    "Always remember your special and unique!"

  7. #7
    iPhoneaholic
    Join Date
    Sep 2007
    Posts
    370
    Thanks
    4
    Thanked 56 Times in 36 Posts

    guess i should update

    lol TheOrioles33
    Last edited by robbpell; 09-18-2009 at 02:03 PM.
    Yeah, you'll be the coolest person in the room when you pull one out and show it around, but that gets old fast when three other people have them and one person somehow has one that glows in the dark.
    John C. Dvorak
    The American columnist and broadcaster in article 'Rethinking the iPhone' in PC Magazine.

  8. #8
    Livin the iPhone Life TheOrioles33's Avatar
    Join Date
    Jul 2007
    Posts
    1,001
    Thanks
    43
    Thanked 66 Times in 52 Posts

    Quote Originally Posted by thetoothfairy View Post
    ^ R U 4 Real?
    I think I am!

  9. #9
    What's Jailbreak? dirtygermankid's Avatar
    Join Date
    Feb 2008
    Posts
    16
    Thanks
    5
    Thanked 2 Times in 2 Posts

    Quote Originally Posted by TheOrioles33 View Post
    LOL! I thought the title of this topic meant a bad thing as in "speed bump" in the road would slow you down!
    I thought the same thing. I re-read the article twice to try to figure out what I was missing.. "speed bump" should say speed jump.. or something. lol.

  10. #10
    What's Jailbreak? enjoi4586's Avatar
    Join Date
    Jun 2008
    Location
    Fort Walton, FL
    Posts
    17
    Thanks
    34
    Thanked 0 Times in 0 Posts

    Quote Originally Posted by dirtygermankid View Post
    I thought the same thing. I re-read the article twice to try to figure out what I was missing.. "speed bump" should say speed jump.. or something. lol.
    Man, I'm glad I'm not the only one that thought this.

  11. #11
    Livin the iPhone Life redcard's Avatar
    Join Date
    Oct 2007
    Location
    Scotchland
    Posts
    2,143
    Thanks
    8
    Thanked 204 Times in 184 Posts

    I wouldn't trust a Frenchman to sit the correct way round on a toilet bowl
    To live, you have to lie

  12. #12
    iPhoneaholic plcrules's Avatar
    Join Date
    Dec 2008
    Location
    New York, New York
    Posts
    372
    Thanks
    40
    Thanked 23 Times in 15 Posts

    I wouldn't trust a Frenchman to sit the correct way round on a toilet bowl
    thats pretty raciest
    but alot of programmers have noticed this speed jump lol

  13. #13
    adp
    adp is offline
    Livin the iPhone Life adp's Avatar
    Join Date
    Jan 2009
    Location
    South FL
    Posts
    1,789
    Thanks
    32
    Thanked 460 Times in 321 Posts

    Quote Originally Posted by redcard View Post
    I wouldn't trust a Frenchman to sit the correct way round on a toilet bowl
    LMAO!!

    And I agree on the speed bump title. It's misleading.
    If I helped you out, please use the Thanks button ------------------------->

  14. #14
    Green Apple
    Join Date
    Jul 2008
    Posts
    50
    Thanks
    3
    Thanked 2 Times in 1 Post
    Quote Originally Posted by redcard View Post
    I wouldn't trust a Frenchman to sit the correct way round on a toilet bowl
    Quote Originally Posted by plcrules View Post
    thats pretty raciest
    but alot of programmers have noticed this speed jump lol


    Nothing racist about it. You've obviously never used a [ame=http://en.wikipedia.org/wiki/Bidet]bidet[/ame] before...
    Last edited by davshirley; 09-18-2009 at 05:27 PM.

  15. #15
    iPhoneaholic plcrules's Avatar
    Join Date
    Dec 2008
    Location
    New York, New York
    Posts
    372
    Thanks
    40
    Thanked 23 Times in 15 Posts

    Nothing racist about it. You've obviously never used a Bidet before...
    lol i have 1 i didnt no it was french

  16. #16
    iPhone? More like MyPhone badass1469's Avatar
    Join Date
    Aug 2008
    Location
    California
    Posts
    199
    Thanks
    4
    Thanked 27 Times in 15 Posts

    Quote Originally Posted by TheOrioles33 View Post
    LOL! I thought the title of this topic meant a bad thing as in "speed bump" in the road would slow you down!
    lol me to, but i guess it's supposed to mean the speed got bumped up.
    damn drug dealers, and there jailbroken iPhones... ____ Hit the thanks if you think i suck

  17. #17
    Retired Moderator StealthBravo's Avatar
    Join Date
    Jan 2008
    Location
    TX  Follow me @StealthBravo
    Posts
    32,478
    Thanks
    44
    Thanked 5,328 Times in 3,113 Posts

    I misread it too

  18. #18
    iPhone? More like MyPhone 808mp5's Avatar
    Join Date
    Sep 2007
    Posts
    241
    Thanks
    15
    Thanked 19 Times in 18 Posts

    Default Miss leading title :)
    Idk bout u guys but when I think about speed bumps I think about cars and slowing down not an increase in speed. I've been working in fcp but it didn't seem to help any there
    "Search" is your friend

  19. #19
    My iPhone is a Part of Me rwin84's Avatar
    Join Date
    Nov 2007
    Location
    Orlando, FL
    Posts
    679
    Thanks
    3
    Thanked 16 Times in 16 Posts

    does anyone remember excite bike??? speed jump, speed hump, speed bump all this talk reminds me of an 8 bit video game
    This is getting a lil' ridiculous...

  20. #20
    iPhoneaholic
    Join Date
    Sep 2007
    Location
    Australia
    Posts
    353
    Thanks
    3
    Thanked 48 Times in 38 Posts

    Normally (I suppose) one would say "A bump in performance". Anyway, as mentioned, you will not see substantial performance increases until the applications are rewritten to take advantage of OpenCL. For my own stuff, I'm seeing a substantial increase in performance using OpenCL on both Snow Leopard and Windows.

Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts