Re: PHP4 vs PHP5 Performance?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



what are the changes that supposedly make php5 faster than php4?

when java went from the 1.4 series to the 5 series it became much faster.
this is because of enhancements to the jitter mechanism for sure.  i dont
know what else they changed, but i know that had a great impact on the
performance.

php5 passes objects around by reference automatically, whereas in php4
if you do not specifically assign references using the
=&
construct a copy will be created.  i suspect if your test included a
scenario
where the =& mechanism was not used in php4, it would not be as fast as
the php5 counterpart, simply because more memory would be consumed.
indeed i suspect there is plenty of php4 code where people have forgotten
to assign object references using =&.

-nathan

On 8/24/07, Steve Brown <sbrown25@xxxxxxxxx> wrote:
>
> Recently, I've been doing a lot of benchmarking with Apache to compare
> different OSes and platforms. I did a stock install of Ubuntu 7.04
> Server w/ Apache2 and PHP5. To do the test, I used ab to fetch the
> following document:
>
> <html>
> <head>
>   <title>PHP Web Server Test</title>
> </head>
> <body>
> <?php phpinfo(); ?>
> </body>
> </html>
>
> I ran ab in a loop 12 times with 10,000 connections and a concurrency
> of 10. Then I threw out the highest result and the lowest result and
> averaged the remaining values.   Both PHP4 (v 4.4.7) and PHP5 (v
> 5.2.3) were built as Apache modules, and I simply changed Apache's
> config file to swap modules.
>
> The results were somewhat surprising to me: on average, PHP4
> significantly outperformed PHP5. Over our LAN PHP5 handled roughly
> 1,200 requests / sec while PHP4 handled over 1,800 requests / sec.
> Since everything I have heard/read is that PHP5 is much faster than
> PHP4, I expected the opposite to be true, but the numbers are what
> they are.  Also PHP on Apache1 was much faster than on Apache2.
>
> The only difference I can figure is that PHP5 was the packaged version
> that comes with Ubuntu and I had to compile PHP4 from source since
> there is no package for it in Feisty. But I wouldn't expect a 50%
> increase as a result of that.  Any thoughts on this?
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>

[Index of Archives]     [PHP Home]     [Apache Users]     [PHP on Windows]     [Kernel Newbies]     [PHP Install]     [PHP Classes]     [Pear]     [Postgresql]     [Postgresql PHP]     [PHP on Windows]     [PHP Database Programming]     [PHP SOAP]

  Powered by Linux