How to test the speed of a m-file execution?

[Xellos]

test speed of a m-file?

In what situation, you can get a fast result of running a program once.

Thx.

 

[nicleo]

test speed of a m-file?

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

 

[brmadhukar]

Re: test speed of a m-file?

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

 

[Xellos]

test speed of a m-file?

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!!!