Re: Re: Performance update involving zval containers. Why not possible?

On Fri, Sep 20, 2013 at 10:01 AM, ruben <ruben.santacruz@gmail.com> wrote: > Pascal Chevrel wrote: > >> Le 20/09/2013 14:06, ruben a écrit : >> >>> Hi, >>> >>> first of all I want to say that I am just a newbie in PHP. I am >>> switching to PHP from other languages and I am exploring how PHP manages >>> references. To do that I am gathering information about what happens >>> with Symbol Tables and Variables Containers when using references. You >>> know: reference-counting, copy-on-write and all that stuff... >>> >>> I found out some cases where I think that some Variable Containers >>> copies could be skipped, thus saving memory and improving performance >>> relying in the copy-on-write principle. I wrote a PDF trying to explain >>> what I mean. It is not written in a very techy language, because I am >>> just new and don't know too much about the internals, but I hope you can >>> understand it and post your comments. >>> >>> Probably if my "update" hasn't been done yet, is because it is not >>> possible, but I will very glad to hear your comments and learn from you.. >>> >>> Thank you very much. >>> >>> >> Hi Ruben, >> >> I think you forgot to put a link to your pdf :) >> >> Regards, >> >> Pascal >> > > Sorry, here it is: > https://www.dropbox.com/s/wxdc99miw82zje9/PHP_references.pdf Change the function to: function & do_something(& $s) { and it should do what you are expecting, reusing a single reference. http://www.php.net/manual/en/language.references.return.php for more reference.