Fastest PHP memory cache/hashtable [closed]

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Closed 8 years ago.

I'm looking for the fastest in-memory cache/hashtable available for PHP.

I will be storing some system-configuration values in it and I'm trying to get the least possible overhead.

The data will be small and granular.

What would you recommend and why?

Answer 1

• chdb is a read-only hashtable shared across PHP processes: Probably the fastest and less memory-angry one.

• Hidef allows to define constants using a .ini file. The constants are defined once, when the php module is started.

• APC can store variables in shared memory, so that they are available to other PHP processes. It has the overhead of serializing and de-serializing variables each time you store and fetch them.

See others: http://pecl.php.net/packages.php?catpid=3&catname=Caching

Answer 2

If you dont have APC or Memcached installed already (or dont want to use them for this) you can also create a RAM disk. Then use file_get_contents() and file_put_contents() where filename is your key and the file content is your value. I dont have numbers for that, but it should be fast.

Answer 3

APC http://php.net/manual/en/book.apc.php

You can use it for optimizing and caching (intermediate) PHP-code

Read this: http://blog.digitalstruct.com/2008/02/27/php-performance-series-caching-techniques/

Answer 4

If your don't intend to modify data (probably true for your configuration files) then use chdb.

Answer 5

• http://www.php.net/manual/en/function.apc-fetch.php
• http://www.php.net/manual/en/function.apc-store.php
• http://www.php.net/manual/en/class.apciterator.php

Specific example:

https://github.com/symfony/symfony/blob/master/src/Symfony/Component/ClassLoader/ApcUniversalClassLoader.php

If you're in multi-server environment, then go for Memcached.