How to check efficiency of my code?

I heard, the command true is faster than logical(1) This I got after reading one answer in this answers forum.

In general how to check efficiency of my code. I usually use to compare 2 programs for the same task by using tic - toc command. Whichever gives lesser time, I use that code in my application.

Here, my question is how to check efficiency of my code in another way(s) ?

Answer 1

[Grzegorz Knor]

See: Profile execution time for function.

Answer 2

[Jan]

The PROFILE command is almost very helpful to measure the execution time of different lines. Unfortuantely it disables the JIT-acceleration, because it can change the order of execution and a the time spent "inside a line" is not meaningful anymore. So especially the accelerated FOR loops get very slow when a PROFILE is created. This might be one reason for the old rumors about slow FOR loops.

CPUTIME measures the time with running CPU. As far as I can see, this reduces the influence of waiting for the harddisk etc. This might be helpful, or useless according to what you want to measure.

There is a nice function in the FEX to measure run-times: TIMEIT. Under Windows you can use the high-accuracy-timer also: HAT.

Finally I'm using TIC TOC also for most measurements. Repeated measurements are required, because there will be some noise.

[Luna]

I was searching about code efficiency, and found that timeit is already built-in so the function in the FEX does not exist anymore.

Putting the link here maybe it helps to someone who searches.

TIMEIT