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Posted by Zouari Fourat on 01/15/05 11:06
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.
>
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