I would guess that using the comma would be faster, as Thiago mentioned. It's just a blind dump of what's in those strings and it dumps the values in sequence directly to the output. A concatenation actually involves temporary memory space for holding value A and value B then possibly a third memory space as a working area of the size strlen(value A) + strlen(value B).. possibly extra operations to figure out the strlen() of each then create the third memory space, etc, etc.. (actual way PHP handles this is unknown to me... just giving a theoretical example). echo "This", " is a ", "test"; // blinding dumps each string to output echo "This " . " is a " . "test"; // Creates a string "This is a test" then dumps it to output But as always, the best way to find out is to create a script to perform the operations a couple thousand times each and record the times. -TG ----- Original Message ----- From: "Thiago Melo de Paula" <thiagomp@xxxxxxxxx> To: Yeti <yeti@xxxxxxxxxx> Cc: php-general@xxxxxxxxxxxxx Date: Mon, 25 Aug 2008 11:07:41 -0300 Subject: Re: Re: concatenating with "." or "," > Hello Yeti! > > This is a very good question, because it shows that you're interested in get > the max from your PHP codes. > > In my research about php optimization, I couldn't find any relevant article > about this specific issue, but some sites tell us that using commas instead > periods on echo constructor would be faster. > I agree with that, because using the concatenation symbol, will cause PHP to > take steps to process the concatenation. > But I think (I never did any performances tests on this subject) that the > gain would be irrelevant on a general site. > > Regards from Brazil. > > Thiago Melo de Paula > > On Mon, Aug 25, 2008 at 10:25 AM, Yeti <yeti@xxxxxxxxxx> wrote: > > > So it is faster to output various strings using the "," instead of "."? > > > > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
