Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

Re^3: Data structures in Perl. A C programmer's perspective.

by BrowserUk (Pope)
on Sep 09, 2013 at 19:38 UTC ( #1053092=note: print w/replies, xml ) Need Help??


in reply to Re^2: Data structures in Perl. A C programmer's perspective.
in thread Data structures in Perl. A C programmer's perspective.

reading the article on Locality of Reference on wiki... I guess sundialsvc4 has a point.

No, he doesn't.

In the context of the discussion in this thread -- the effects of locality of reference on the performance of arrays or vectors versus linked-lists -- the salient part of the wiki article is:

Typical memory hierarchy (access times and cache sizes are approximations of typical values used as of 2013 for the purpose of discussion; actual values and actual numbers of levels in the hierarchy vary): CPU registers (8-256 registers) – immediate access, with the speed of the inner most core of the processor

  • L1 CPU caches (32 KiB to 512 KiB) – fast access, with the speed of the inner most memory bus owned exclusively by each cores
  • L2 CPU caches (128 KiB to 24 MiB) – slightly slower access, with the speed of the memory bus shared between twins of cores
  • L3 CPU caches (2 MiB to 32 MiB) – even slower access, with the speed of the memory bus shared between even more cores of the same processor

    Main physical memory (RAM) (256 MiB to 64 GiB) – slow access, the speed of which is limited by the spatial distances and general hardware interfaces between the processor and the memory modules on the motherboard

  • Since people don't appear to have bothered to watch the full video I linked above, here is the salient part of it (7:46). It'd be worth 8 minutes of anyone's time to watch it.


    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.
    • Comment on Re^3: Data structures in Perl. A C programmer's perspective.

    Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Node Status?
    node history
    Node Type: note [id://1053092]
    help
    Chatterbox?
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others chilling in the Monastery: (10)
    As of 2017-08-22 17:49 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Who is your favorite scientist and why?



























      Results (337 votes). Check out past polls.

      Notices?