Tips to improve PHP7 performance using OPcache extension

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PrefaceIt's half past eleven, and it's time to settle.

When PHP is running, there is such a process. The PHP code is first pre-compiled, the bytecode is generated and then loaded into the memory. Finally, the CPU executes the compiled bytes on the memory. code fragment. We will find that when executing a PHP program, we go through such a process every time. This is not a waste of time. Yes, it is easy to think: Why not follow the C language and compile the source code into a file that can be directly loaded into the memory so Where is brother? Uh-huh?. Get out your rifle and load this bullet

OPcache. Since PHP5.5.0 came out, this zend extension has been built-in.

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What is OPcache
OPcacheis a Zend extension in PHP that can greatly improve the performance of PHP.OPcache improves the performance of PHP by storing the precompiled bytecode of PHP scripts in shared memory. The advantage of storing precompiled bytecode is that it saves the overhead of loading and parsing PHP scripts each time.

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Judge whether it has been extended OPcache

➜ ~ php -m | grep OPcache Zend OPcache Zend OPcache

If it is not enabled, you can enable it in the php.ini configuration

/home /samego/service/php7.2/php.ini

➜ ~ echo zend_extension="opcache.so" >> /home/samego/service/php7.2/php.ini

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About OPcache configureNext, we need to enable OPcache in the PHP configuration file (The default is closed):

opcache.enable=1

Let’s continue to make some optimization configurations for OPcache:

opcache.memory_consumption=512

This configuration indicates the memory space (unit: MB) you want to allocate to OPcache, set A value greater than 64 will do.

opcache.interned_strings_buffer=64

This configuration indicates the space (unit: MB) you want to allocate to the actual string. Just set a value greater than 16.

opcache.max_accelerated_files=32531

This configuration indicates how many scripts can be cached. Set this value as close as possible to (or greater than) the number of scripts contained in the project.

opcache.validate_timestamps=0

Change the configuration value for revalidation scripts. If set to 0 (best performance), you need to manually clear the OPcache after each PHP code change. If you don't want manual purging, you can set it to 1 and configure the revalidation interval via opcache.revalidate_freq, which may cost some performance since changes need to be checked every x seconds.

opcache.save_comments=1

This configuration will leave comments in the script. I recommend turning this option on because some libraries depend on this configuration and I can't find any benefit of turning it off.

opcache.fast_shutdown=0

Fast shutdown will provide a faster mechanism to clean up memory, however, in my benchmark tests, it was slower. Maybe this will bring some performance improvements to the application, but you need to try it yourself.

So, the final configuration optimization looks like this:

opcache.enable=1 opcache.memory_consumption=512 opcache.interned_strings_buffer=64 opcache.max_accelerated_files=32531 opcache.validate_timestamps=0 opcache.save_comments=1 opcache.fast_shutdown=0

You can experiment with these configuration values. The specific configuration values depend on your application size and server configuration.Learning from the Laravel Community

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Laravel OPcache

• install

  ➜ ~ composer require appstract/laravel-opcache

• configure

  ➜ ~ php artisan vendor:publish --provider="Appstract\Opcache\OpcacheServiceProvider" --tag="config"

• command

# Clear OPcache: ➜ ~ php artisan opcache:clear # Show OPcache config: ➜ ~ php artisan opcache:config # Show OPcache status: ➜ ~ php artisan opcache:status # Pre-compile your application code: ➜ ~ php artisan opcache:optimize

Scenario test to wait and see

Personally, I prefer the data-speaking

scenario: (1) Requesting the GET interface (2) The number of tests is 10 (3) The number of concurrency is 100

case non-extension

1000 requests, took 32.32 seconds, 30.94 requests per second

Transactions: 1000 hits Availability: 100.00 % Elapsed time: 32.32 secs Data transferred: 0.97 MB Response time: 0.32 secs Transaction rate: 30.94 trans/sec Throughput: 0.03 MB/sec Concurrency: 9.96 Successful transactions: 1000 Failed transactions: 0 Longest transaction: 0.44 Shortest transaction: 0.11

case had extend

1000 The request took 2.94 seconds, 340.14 requests per second

Transactions: 1000 hits Availability: 100.00 % Elapsed time: 2.94 secs Data transferred: 0.97 MB Response time: 0.03 secs Transaction rate: 340.14 trans/sec Throughput: 0.33 MB/sec Concurrency: 9.86 Successful transactions: 1000 Failed transactions: 0 Longest transaction: 0.29 Shortest transaction: 0.01

I was very happy to see this set of data, extremely happy. In terms of performance, there is such a sharp contrast that I won’t say anything ~OPcache is right

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