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Performance tuning PHP5

php.internals

Sterling Hughes

23 years ago

Hey,

I've been benchmarking the PHP5 and PHP4.  Found a neat little way to
improve the performance like crazy.  Go into zend_mm.h and change:

#define ZEND_MM

To:

#undef ZEND_MM

And touch zend_alloc.c, recompile, and then rebenchmark.  My tests show
a 15-20% performance improvement *across the board* between before and
after.  This probably increases if you're using a webserver like apache,
where the memory manager really screws things up.

-Sterling

--
"C makes it easy to shoot yourself in the foot; C++ makes it harder,
but when you do, it blows away your whole leg."
- Bjarne Stroustrup

Daniel T. Gorski

23 years ago

On 20 May 20:38, Sterling Hughes wrote:

Hi,

> #define ZEND_MM
> To:
> #undef ZEND_MM

> And touch zend_alloc.c, recompile, and then rebenchmark.  My tests show
> a 15-20% performance improvement *across the board* between before and
> after.  This probably increases if you're using a webserver like apache,
> where the memory manager really screws things up.

I've here a midsize PHP5 application (about 50K LOC) with a lot of
abstraction layers running as CGI ... disabling MM accelerated the whole
thing by about 25%, or even more.

Are there any problems expected without the MM?

regards dtg

Andi Gutmans

23 years ago

At 05:16 AM 5/21/2003 +0200, Daniel T. Gorski wrote:

>On 20 May 20:38, Sterling Hughes wrote:
>
>Hi,
>
> > #define ZEND_MM
> > To:
> > #undef ZEND_MM
>
> > And touch zend_alloc.c, recompile, and then rebenchmark.  My tests show
> > a 15-20% performance improvement *across the board* between before and
> > after.  This probably increases if you're using a webserver like apache,
> > where the memory manager really screws things up.
>
>I've here a midsize PHP5 application (about 50K LOC) with a lot of
>abstraction layers running as CGI ... disabling MM accelerated the whole
>thing by about 25%, or even more.
>
>Are there any problems expected without the MM?

Nope.

Andi