Learn about several settings to optimize PHP7 performance

This article will take you through several settings to optimize the performance of PHP7. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

PHP7 has been released. As the largest version upgrade and the largest performance upgrade of PHP in 10 years, PHP7 has shown obvious performance improvements in multiple tests. However, , in order to maximize its performance, I still want to remind you of a few things.

PHP7 VS PHP5.6

1. Opcache

Remember to enable Zend Opcache, because PHP7 is faster even without Opcache than PHP-5.6 with Opcache enabled, so some people did not enable Opcache during the previous testing period. Enabling Opcache is very simple, in PHP Add to the .ini configuration file:

zend_extension=opcache.so
opcache.enable=1
opcache.enable_cli=1"

2. Use a new compiler

Use a newer compiler, GCC 4.8 or above is recommended, because only GCC 4.8 or above PHP will open Global Register for opline and execute_data support, this will bring about 5% performance improvement (measured from the QPS perspective of Wordpres)

In fact, GCC versions before 4.8 also support it, but we found that it supports bugs, so it must be This feature will only be enabled in versions 4.8 and above.

3. HugePage

My previous article also introduced: Hugepage to make your PHP7 faster, first enable HugePages in the system, and then Turn on Opcache's huge_code_pages.

Take my CentOS 6.5 as an example, allocate 512 reserved huge page memory through:

$sudo sysctl vm.nr_hugepages=512

:

$ cat /proc/meminfo  | grep Huge
AnonHugePages:    106496 kB
HugePages_Total:     512
HugePages_Free:      504
HugePages_Rsvd:       27
HugePages_Surp:        0
Hugepagesize:       2048 kB

Then in php.ini Add:

opcache.huge_code_pages=1

In this way, PHP will use large memory pages to save its own text segment and the huge in memory allocation, reducing TLB misses and thereby improving performance.

4. Opcache file cache

Enable Opcache File Cache (experimental). By enabling this, we can let Opcache cache the opcode cache in an external file. For some scripts, there will be a significant performance improvement.
Add:

opcache.file_cache=/tmp

to php.ini so that PHP will cache some Opcode binary export files in the /tmp directory, which can exist across the PHP life cycle.

5. PGO

My previous article: Make your PHP7 faster (GCC PGO) also introduced that if your PHP is specifically for one project, such as just for your WordPress, or Drupal, or something else, then You can try to use PGO to improve PHP, specifically to improve the performance of your project.

Specifically, take wordpress 4.1 as the optimization scenario. First, when compiling PHP:

$ make prof-gen

Then use your project to train PHP, for example, for WordPress:

$ sapi/cgi/php-cgi -T 100 /home/huixinchen/local/www/htdocs/wordpress/index.php >/dev/null

That is, let php-cgi run 100 times on the WordPress homepage, thereby generating some profile information in the process.

Finally:

$ make prof-clean$ make prof-use && make install

The PHP7 you compile at this time is the highest performance compiled version tailored for your project.

That’s all for now, I will add more when I think of it later. Everyone is welcome to try it, thanks

Recommended learning: php video tutorial

The above is the detailed content of Learn about several settings to optimize PHP7 performance. For more information, please follow other related articles on the PHP Chinese website!