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Posted by Xuefer Tinys on 01/16/05 05:38
$_SESSION is same as it use serialize/unserialize, alghough there're
some difference
On Sat, 15 Jan 2005 10:06:58 +0100, Zouari Fourat <fourat@gmail.com> wrote:
> what about using $_SESSION arrays ?
>
>
> On Fri, 14 Jan 2005 19:28:24 -0500, Al <news@ridersite.org> wrote:
> > George Schlossnagle addresses exactly your requirement in his book "Advanced PHP
> > Programming".
> >
> > Josh Whiting wrote:
> > > Dear list,
> > >
> > > My web application (an online classifieds server) requires a set of
> > > fairly large global arrays which contain vital information that most all
> > > the page scripts rely upon for information such as the category list,
> > > which fields belong to each category, and so on. Additionally, there are
> > > a large number of function definitions (more than 13,000 lines of code
> > > in all just for these global definitions).
> > >
> > > These global arrays and functions never change between requests.
> > > However, the PHP engine destroys and recreates them every time. After
> > > having spent some serious time doing benchmarking (using Apache Bench),
> > > I have found that this code takes at least 7ms to parse per request on
> > > my dual Xeon 2.4ghz server (Zend Accelerator in use*). This seriously
> > > cuts into my server's peak capacity, reducing it by more than half.
> > >
> > > My question is: is there a way to define a global set of variables and
> > > functions ONCE per Apache process, allowing each incoming hit to run a
> > > handler function that runs within a persistent namespace? OR, is it
> > > possible to create some form of shared variable and function namespace
> > > that each script can tap?
> > >
> > > AFAIK, mod_python, mod_perl, Java, etc. all allow you to create a
> > > persistent, long-running application with hooks/handlers for individual
> > > Apache requests. I'm surprised I haven't found a similar solution for
> > > PHP.
> > >
> > > In fact, according to my work in the past few days, if an application
> > > has a large set of global functions and variable definitions, mod_python
> > > FAR exceeds the performance of mod_php, even though Python code runs
> > > significantly slower than PHP code (because in mod_python you can put
> > > all these definitions in a module that is loaded only once per Apache
> > > process).
> > >
> > > The most promising prospect I've come across is FastCGI, which for Perl
> > > and other languages, allows you to run a while loop that sits and
> > > receives incoming requests (e.g. "while(FCGI::accept() >= 0) {..}").
> > > However, the PHP/FastCGI modality seems to basically compare to mod_php:
> > > every request still creates and destroys the entire application
> > > (although the PHP interpreter itself does persist).
> > >
> > > Essentially I want to go beyond a persistent PHP *interpreter* (mod_php,
> > > PHP/FastCGI) and create a persistent PHP *application*... any
> > > suggestions?
> > >
> > > Thanks in advance for any help!
> > > Regards,
> > > J. Whiting
> > >
> > > * - Please note that I am using the Zend Accelerator (on Redhat
> > > Enterprise with Apache 1.3) to cache the intermediate compiled PHP code.
> > > My benchmarks (7ms+) are after the dramatic speedup provided by the
> > > accelerator. I wouldn't even bother benchmarking this without the
> > > compiler cache, but it is clear that a compiler cache does not prevent
> > > PHP from still having to run the (ableit precompiled) array and function
> > > definition code itself.
> >
> > --
> > PHP General Mailing List (http://www.php.net/)
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> >
> >
>
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