Re: Performance of element access in Vector

["(see below)" <yaldnif.w@blueyonder.co.uk>]

On 19/01/2009 03:23, in article
c8a97381-667c-4fda-8a1b-b4035f4281b8@o40g2000yqb.googlegroups.com,
"george.priv@gmail.com" <george.priv@gmail.com> wrote:
> 
> Results came as:
> 
> raw array                : 00:00:09.82
> direct index             : 00:00:23.02
> Update_Element and index : 00:01:29.96
> direct cursor            : 00:02:22.65
> Update_Element and cursor: 00:03:36.51
> Iterate                  : 00:02:13.03

On my very modest MacBook Pro, using:
GNATMAKE 4.4.0 20080329 (experimental) [trunk revision 133715]

With command:
gnatmake -funwind-tables  -g -gnatfl05wawCwl -gnatNnp \
-falign-loops=24  -fno-stack-check -funroll-loops -fsched-interblock -O3 A \
-largs -lgcc_eh -bargs -Sev

I get:

raw array                : 00:00:08.44
direct index             : 00:00:11.06
Update_Element and index : 00:00:50.31
direct cursor            : 00:00:20.51
Update_Element and cursor: 00:00:56.03
Iterate                  : 00:01:40.47

So it seems to be question of compiler version and options.

-- 
Bill Findlay
<surname><forename> chez blueyonder.co.uk