关于求matlab程序的运行时间，自己用的最多是tic和toc；而对于复杂的程序，Profile是个不错的性能分析工具。

1. profile

例子：

profile on

   plot(magic(35))

profile viewer

profsave(profile(\'info\'),\'profile_results\')

profile on -history

plot(magic(4));

p = profile(\'info\');

for n = 1:size(p.FunctionHistory,2)

if p.FunctionHistory(1,n)==0

str = \'entering function: \';

else

str = \' exiting function: \';

end

disp([str p.FunctionTable(p.FunctionHistory(2,n)).FunctionName]);

end

2. tic,toc

tic

operation

toc

3. cputime

t=cputime;

your_operation

cputime-t

4. clock,etime

t0 = clock;

operation

etime(clock,t0)