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Posts by vraa

1) Message boards : Number crunching : Hello, sorry about this WU (Message 14050)
Posted 5 Mar 2009 by vraa
Post:
I'm afraid my computer would not crunch it

3/5/2009 5:11:04 PM|Milkyway@home|Computation for task ps_s79_10_6807_1235779573_1 finished
2) Message boards : Number crunching : Question about length of work units (Message 6235)
Posted 17 Nov 2008 by vraa
Post:
The very first work units, I have also noticed, get done rather quickly. (In a few minutes)
Then they take a while.

If you take the new optimized app (not default yet) then the hour long WU's go back to taking a few minutes because the code has been cleaned up.
3) Message boards : Number crunching : Source code improvement discussion (Message 5435)
Posted 10 Oct 2008 by vraa
Post:
I am not a programmer though, so I'm not too familar on how to interpret the results


I am a programmer, but not one that has ever really had to deal with performance profiling and tuning of an application. I see that it spent a lot of time in what I had gone back up to earlier today, calculate_integrals. It has pointers to what I believe are 3 structs being sent into it. I may be wrong about structs. It has been quite a while since actively dealing with C or C++. This is where I start disliking C, with all the pointers and referencing and dereferencing and manual memory management rather than the "easy" way of garbage collection, etc, etc, etc... However, I know that opinion comes from the fact that I do "business logic" applications, not scientific or math applications...

Anyway, if I'm feeling really industrious, sometime over the weekend I may try to get my old Visual Studio 6 installed...and see if I can remember how in the heck to compile / make the thing... .Net makes it real easy to just load the .prj or .sln...


You can do C in any Visual Studio version. I recommend 2005. I like VS a lot. I switched to Mac though and my onIy regret is I have to use xCode now.


Hello
I am on Mac too
I use XCode sometimes to compile things I download
Does this project have a XCode project for the app?
I would also like to help optimize this app, I can recognize that from the above example dividing by d and then multiplying by d is an unnecessary and therefore wasteful operation!



Yes, in fact this project does have an xCode project. I think the decision was made that when the new app gets released then we will open up all the code to the community. For now though, the code seems to be floating around out there on the web so if you can find it, grab it and throw it into xCode.

Interesting!
I was able to find the xcode project, thanks!

I am glad you have Mac compatibility :)
4) Message boards : Number crunching : Source code improvement discussion (Message 5433)
Posted 10 Oct 2008 by vraa
Post:
I am not a programmer though, so I'm not too familar on how to interpret the results


I am a programmer, but not one that has ever really had to deal with performance profiling and tuning of an application. I see that it spent a lot of time in what I had gone back up to earlier today, calculate_integrals. It has pointers to what I believe are 3 structs being sent into it. I may be wrong about structs. It has been quite a while since actively dealing with C or C++. This is where I start disliking C, with all the pointers and referencing and dereferencing and manual memory management rather than the "easy" way of garbage collection, etc, etc, etc... However, I know that opinion comes from the fact that I do "business logic" applications, not scientific or math applications...

Anyway, if I'm feeling really industrious, sometime over the weekend I may try to get my old Visual Studio 6 installed...and see if I can remember how in the heck to compile / make the thing... .Net makes it real easy to just load the .prj or .sln...


You can do C in any Visual Studio version. I recommend 2005. I like VS a lot. I switched to Mac though and my onIy regret is I have to use xCode now.


Hello
I am on Mac too
I use XCode sometimes to compile things I download
Does this project have a XCode project for the app?
I would also like to help optimize this app, I can recognize that from the above example dividing by d and then multiplying by d is an unnecessary and therefore wasteful operation!
5) Message boards : Number crunching : Source code improvement discussion (Message 5430)
Posted 10 Oct 2008 by vraa
Post:
http://transmission.pastebin.com/f69401f4

Sorry for the length
I was able to figure out how to run the Astronomy process through Shark, a popular profiling tool on Mac OS X
I am not a programmer though, so I'm not too familar on how to interpret the results
I hope the above is helpful in determining where the eyeballs should be focusing
I can produce many more if needed, this was a 30 second sample with every sample done every 1 ms.
6) Message boards : MilkyWay@home Science : Milky Way's mass is drastically reduced (Message 3630)
Posted 1 Jun 2008 by vraa
Post:
"What you see depends on the particular streams that happen to have fallen in to our galaxy," he told New Scientist. "I'm pretty sure this is unlikely to be the final word."

I think the last paragraph is the most accurate

Isn't the scientific method all about not being irrefutable?
7) Message boards : MilkyWay@home Science : SDSS Stripe 82 searches (Message 3629)
Posted 1 Jun 2008 by vraa
Post:
THIS IS AWESOME

What are we searching for?
8) Message boards : MilkyWay@home Science : Question from Kids by Josh (Message 2819)
Posted 25 Mar 2008 by vraa
Post:
Constellations only reflect what society sees at the time, in a sense psychologically projecting itself onto the stars.

Remember different cultures call certain Constellations different things (in different languages too).

I would most positively get "Cosmos" by Carl Sagan (book or the tv series) for a kid who has even the smallest inkling of curiosity.

http://www.amazon.com/s/ref=nb_ss_gw/105-3878210-5376436?url=search-alias%3Daps&field-keywords=cosmos+carl+sagan&x=0&y=0

Also Hawking's "A Brief History of Time" is amazing as well.




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