> -----Original Message-----
> From: Jenda Krynicky [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, May 25, 2004 8:08 PM
> To: [EMAIL PROTECTED]
> Subject: RE: Question of memory management in Perl
>
>
> From: [EMAIL PROTECTED]
> > I don't know for sure the effect of:
> >
> > @out_array_bin = map {""} (@out_array_bin);
> >
> > instead of
> >
> > for ($init_cnt=0;$init_cnt<=$#out_array_bin;$init_cnt++) {
> > $out_array_bin[$init_cnt] = "";
> > }
> >
> > But is more readable.
>
> Neither makes much sense.
> And the map based one is actually even more memory hungry.
>
> @out_array_bin = ();
> or
> undef @out_array_bin;
>
> will clear the array completely and will be much quicker.
>
> The problem with the for(){} is that it doesn't get rid of the whole
> array, just the values of the elements. So you end up with a huge
> array containing empty strings. Which will take up quite some memory.
>
> The map{} is even worse because instead of "clearing" the array "in
> place" it creates a new huge array containing the empty strings. So
> at one point you have two huge arrays. One containing the data and
> the other containnig the empty strings :-(
>
> Jenda
I supose that the end result of:
for ($init_cnt=0;$init_cnt<=$#out_array_bin;$init_cnt++) {
$out_array_bin[$init_cnt] = "";
}
and
'@out_array_bin = ();' or 'undef @out_array_bin;'
is not the some, is it?
In the memory probably I write in the first parte of the mail.
This was a cleaner code than the one he had not consedering the memory
problem.
when I wrouth "I don't know for sure the effect of" was considering the time
effect not the memory question. Sory if I was not clear.
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