[Biococoa-dev] Profiling results

[Alexander Griekspoor]

John,

> Clocked in with the following with three repeats
> 2004-12-02 22:50:20.552 Translation[14076] time after translation: 
> -8.624725
> 2004-12-02 22:50:30.823 Translation[14076] time after translation: 
> -8.609338
> 2004-12-02 22:50:41.563 Translation[14076] time after translation: 
> -8.681358
>
> Changing the part of BCSequenceFactory in question as follows:
> //aSymbol = (BCSymbol *)CFArrayGetValueAtIndex( (CFArrayRef) 
> theContents,
> loopCounter);
> aSymbol = [theContents objectAtIndex: loopCounter];
>
> Clocked in as:
> 2004-12-02 22:55:25.098 Translation[14553] time after translation: 
> -9.005473
> 2004-12-02 22:55:34.217 Translation[14553] time after translation: 
> -9.083258
> 2004-12-02 22:55:46.097 Translation[14553] time after translation: 
> -9.020712
>
> So, it's slower, but not much slower.  In contrast, it is MUCH MUCH 
> easier
> to read.  So, in the future, I think it's safe to skip this unless 
> you're
> doing multiple object lookups within a single loop.

Definitely! A lot of cocoa stuff (like NSArrays and CFArrays) can be 
toll-free bridges, and I guess that's exactly what happens under the 
hood, so I thought already that this wouldn't speed things up so much. 
At the time the reason was really to get of the enumerator. Let's 
indeed do it the readible way and reside to Core Foundation only when 
we can get rid of a lot of object messaging (in terms of: really a 
lot..).

Cheers,
Alex

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                      ** Alexander Griekspoor **
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                The Netherlands Cancer Institute
                Department of Tumorbiology (H4)
          Plesmanlaan 121, 1066 CX, Amsterdam
                   Tel:  + 31 20 - 512 2023
                   Fax:  + 31 20 - 512 2029
                  AIM: mekentosj at mac.com
                   E-mail: a.griekspoor at nki.nl
               Web: http://www.mekentosj.com

    The requirements said: Windows 2000 or better.
    So I got a Macintosh.

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