php-apcu - 5.1.17+4.0.11-1 main

The APCu is userland caching: APC (Alternative PHP Cache) stripped of
opcode caching after the deployment of Zend OpCache in PHP 5.5 as the
primary solution to opcode caching in future versions of PHP.
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The APCu is a fast solution for userland caching (and dumping) of PHP
variables locally, it is not distributed like MemcacheD, but they can
be used together for optimal caching.