Saeed here's a quick (and dirty) test I ran:
$tests = 1000000;
$start = microtime(true);
for ($i=0; $i<$tests; $i++) {
$a = md5( rand() );
$b = md5( rand() );
$c = $a.$b;
}
var_dump( "By concat op:\t". (microtime(true) - $start) );
$start = microtime(true);
for ($i=0; $i<$tests; $i++) {
$a = md5( rand() );
$b = md5( rand() );
$c = "$a$b";
}
var_dump( "By string:\t\t". (microtime(true) - $start) );
Sample results:
string(30) "By concat op: 2.1713118553162"
string(27) "By string: 2.2525599002838"
string(30) "By concat op: 2.2123351097107"
string(27) "By string: 2.2798750400543"
string(29) "By concat op: 2.1521489620209"
string(27) "By string: 2.2470209598541"
string(29) "By concat op: 2.1347990036011"
string(27) "By string: 2.1982681751251"
I would say that under virtually all cases that difference is less
then negligible.
Chris H.
On Tue, Oct 5, 2010 at 3:35 PM, Ashley Sheridan <ash@xxxxxxxxxxxxxxxxxxxx>wrote:
> On Tue, 2010-10-05 at 15:28 -0400, chris h wrote:
>
> Benchmark and find out! :)
>
> What are you using this for? Unless you are doing something crazy it
> probably doesn't matter, and you should pick whichever you feel looks nicer
> / is easier to code in / etc.
>
> Chris H.
>
> On Tue, Oct 5, 2010 at 3:23 PM, saeed ahmed <saeed.sas@xxxxxxxxx> wrote:
>
> > $a = 'hey';
> > $b = 'done';
> >
> > $c = $a.$b;
> > $c = "$a$b";
> >
> > which one is faster for echo $c.
> >
>
>
> As far as I'm aware, the first of the two will be faster, but only just. As
> Saeed mentioned, the difference will be negligible, and unless you plan to
> run a line like that in a loop or something hundreds of thousands of times,
> you probably won't notice any difference.
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>
>
