Re: Measuring script speed

[Matyas]

Just wanted to point out that tic/toc measures wall time, and not cputime.  Wall time may be what the original poster want.

If someone can point to a good discussion on how to measure algorithm time (say for scientific publication) I would be interested. 

In my C functions (not scripts) I return the timing results.  I have found that to be convenient. 

Sent from an Android phone running a Linux kernel.

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Today's Topics:

   1. Re: measuring script speed (Ben Abbott)
   2. Re: measuring script speed (BVBA NuKey Music)
   3. Re: measuring script speed (marco atzeri)


----------------------------------------------------------------------

Message: 1
Date: Sun, 18 Dec 2011 11:53:34 -0500
From: Ben Abbott <address@hidden>
To: BVBA NuKey Music <address@hidden>
Cc: address@hidden
Subject: Re: measuring script speed
Message-ID: <address@hidden>
Content-Type: text/plain; CHARSET=US-ASCII

On Dec 18, 2011, at 11:49 AM, BVBA NuKey Music wrote:

> I thought I could measure the execution time of a script like this:
> begintime=cputime;myscript;cputime-begintime
> 
> this does not work however with scripts which start with a clear
> command because the begintime-variable gets erased. Therefore I
> thought in stead of deleting the clear statement for the test, I could
> proceed as follows:
> global begintime=cputime;myscript;cputime-begintime
> 
> unfortunately this doesn't work, I also tried this on the linux command line:
> time octave<myscript.m
> 
> this works but I see the octave-environment being opened which could
> falsify the timing results
> 
> so what's the best way to achieve this?
> 
> thanks in advance
> nukey

Try 

	tic (); myscript; toc ()

Ben


------------------------------

Message: 2
Date: Sun, 18 Dec 2011 17:59:50 +0100
From: BVBA NuKey Music <address@hidden>
To: Ben Abbott <address@hidden>, address@hidden
Subject: Re: measuring script speed
Message-ID:
	<address@hidden>
Content-Type: text/plain; charset="iso-8859-1"

2011/12/18 Ben Abbott <address@hidden>

> On Dec 18, 2011, at 11:49 AM, BVBA NuKey Music wrote:
>
> > I thought I could measure the execution time of a script like this:
> > begintime=cputime;myscript;cputime-begintime
> >
> > this does not work however with scripts which start with a clear
> > command because the begintime-variable gets erased. Therefore I
> > thought in stead of deleting the clear statement for the test, I could
> > proceed as follows:
> > global begintime=cputime;myscript;cputime-begintime
> >
> > unfortunately this doesn't work, I also tried this on the linux command
> line:
> > time octave<myscript.m
> >
> > this works but I see the octave-environment being opened which could
> > falsify the timing results
> >
> > so what's the best way to achieve this?
> >
> > thanks in advance
> > nukey
>
> Try
>
>        tic (); myscript; toc ()
>
> Ben
>
Thanks, this solves my problem!

best regards,
nukey
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Message: 3
Date: Sun, 18 Dec 2011 18:05:43 +0100
From: marco atzeri <address@hidden>
To: address@hidden
Subject: Re: measuring script speed
Message-ID: <address@hidden>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

On 12/18/2011 5:49 PM, BVBA NuKey Music wrote:
> I thought I could measure the execution time of a script like this:
> begintime=cputime;myscript;cputime-begintime
>
> this does not work however with scripts which start with a clear
> command because the begintime-variable gets erased. Therefore I
> thought in stead of deleting the clear statement for the test, I could
> proceed as follows:
> global begintime=cputime;myscript;cputime-begintime
>
> unfortunately this doesn't work, I also tried this on the linux command line:
> time octave<myscript.m
>
> this works but I see the octave-environment being opened which could
> falsify the timing results
>
> so what's the best way to achieve this?
>
> thanks in advance
> nukey

tic()
myscript;
toc()

Regards
Marco


------------------------------

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