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Xellos
Joined: 06 Jan 2005
Posts: 8
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 06 Feb 2005 22:41 test speed of a m-file? |
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In what situation, you can get a fast result of running a program once.
Thx.
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nicleo
Joined: 06 Sep 2004
Posts: 717
Helped: 60
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| 07 Feb 2005 1:16 test speed of a m-file? |
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If you would to know how long a m-file is executed, you can do as follows:
TimeStart = cputime; % At the beginning of the m-file
TimeConsumed = cputime-TimeStart; % At the end of the m-file
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brmadhukar
Joined: 21 Jun 2002
Posts: 844
Helped: 29
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| 07 Feb 2005 17:07 Re: test speed of a m-file? |
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Hi,
you need to
1) avoid declaring new variable in a loop.
2) avoid indexing that grows in a loop
3) predefine arrays with zero
4) use LUTs
hope this helps
brmadhukar
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Xellos
Joined: 06 Jan 2005
Posts: 8
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| 07 Feb 2005 21:54 test speed of a m-file? |
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thanks a lot!
Added after 4 hours 40 minutes:
another question please!
how can matlab calculates with uint8 data?
I know it can only tell one uint8 number bigger than another uint8. Can it do the addition with uint8 numbers.
or if compile m-file to a c++ program, will it be faster? if so, how to test the speed of a c program?
thanks for your time!!!
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