Comments on: Speeding up Doug’s solution with the profiler http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/ Doug Hull is a proud MathWorker who is on a mission to help you with MATLAB. Mon, 23 Nov 2009 00:12:42 +0000 http://wordpress.org/?v=2.3.1 By: dhull http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1425 dhull Fri, 01 May 2009 17:07:08 +0000 http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1425 Baskaran, You would have to look to Seth: http://blogs.mathworks.com/seth I only do MATLAB. Doug Baskaran,

You would have to look to Seth:

http://blogs.mathworks.com/seth

I only do MATLAB.

Doug

]]> By: Baskaran http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1424 Baskaran Thu, 30 Apr 2009 23:39:32 +0000 http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1424 Hi Doug, very useful video. Can you pls provide some video tutorial for simulink profiler. Hi Doug,
very useful video. Can you pls provide some video tutorial for simulink profiler.

]]> By: dhull http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1404 dhull Wed, 22 Apr 2009 12:58:50 +0000 http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1404 @daniel, The User Interface that I used does not have access to all the functionality that the command line does. It is easy to use and fits what most people want when they profile. Doug @daniel,

The User Interface that I used does not have access to all the functionality that the command line does. It is easy to use and fits what most people want when they profile.

Doug

]]> By: dhull http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1403 dhull Wed, 22 Apr 2009 12:53:59 +0000 http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1403 Yi, Weird, I just checked the main blog and the permalink. They were both the proper video. Please send me your system information via e-mail. Try and clear your cache before trying it again though. I would like to clear this up. Thanks, Doug Yi,

Weird, I just checked the main blog and the permalink. They were both the proper video. Please send me your system information via e-mail. Try and clear your cache before trying it again though. I would like to clear this up.

Thanks,
Doug

]]> By: Daniel Armyr http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1402 Daniel Armyr Mon, 20 Apr 2009 10:56:04 +0000 http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1402 This viedoe raised a user interface question for me: If I profile my scripts from within the profiler and not from the commandline, how can I set profiling options, like what clock to use, weather to clock built-ins, and so on? I found no such menu options just now. Sincerely Daniel Armyr This viedoe raised a user interface question for me:
If I profile my scripts from within the profiler and not from the commandline, how can I set profiling options, like what clock to use, weather to clock built-ins, and so on? I found no such menu options just now.

Sincerely
Daniel Armyr

]]> By: Yi Cao http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1401 Yi Cao Mon, 20 Apr 2009 07:41:12 +0000 http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1401 Doug This is weird. The video I saw on your blog home page is different from the one on the comment page. Maybe you wish to find the reason. I initially saw the video on the blog home page and found it was not as you described in the blog, hence just left until I saw some comments there. In order to read these comments, I went into the comment page, then found the actual video is there. Yi Doug

This is weird. The video I saw on your blog home page is different from the one on the comment page. Maybe you wish to find the reason.

I initially saw the video on the blog home page and found it was not as you described in the blog, hence just left until I saw some comments there. In order to read these comments, I went into the comment page, then found the actual video is there.

Yi

]]> By: dhull http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1400 dhull Fri, 17 Apr 2009 19:39:31 +0000 http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1400 Naor, One of the things to consider is that in this case, the function was called 500000 times for a total of 1.7 seconds or >> 1.7/500000 ans = 3.4000e-006 So, the over head is minuscule, tiny, nothing. But that small amount of overhead times half a million? Well, now it is a noticeable delay. This is an extreme case. I would not worry about it normally. -doug Naor,

One of the things to consider is that in this case, the function was called 500000 times for a total of 1.7 seconds or

>> 1.7/500000

ans =

3.4000e-006

So, the over head is minuscule, tiny, nothing. But that small amount of overhead times half a million? Well, now it is a noticeable delay.

This is an extreme case. I would not worry about it normally.

-doug

]]> By: Naor http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1399 Naor Fri, 17 Apr 2009 18:38:46 +0000 http://blogs.mathworks.com/videos/2009/04/17/speeding-up-dougs-solution-with-the-profiler/#comment-1399 Doug, I was somewhat surprised that there was such a significant overhead to calling a one-liner function. Is this a general feature? Can I speed up my code by simply by replacing every instance of pi with 3.14? Or did I misunderstand something in the video? Thanks Doug,
I was somewhat surprised that there was such a significant overhead to calling a one-liner function. Is this a general feature? Can I speed up my code by simply by replacing every instance of pi with 3.14? Or did I misunderstand something in the video?
Thanks

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