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add a note about apc for php recent versions #4370

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5 changes: 3 additions & 2 deletions book/performance.rst
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Expand Up @@ -18,8 +18,9 @@ Use a Byte Code Cache (e.g. APC)
One of the best (and easiest) things that you should do to improve your performance
is to use a "byte code cache". The idea of a byte code cache is to remove
the need to constantly recompile the PHP source code. There are a number of
`byte code caches`_ available, some of which are open source. The most widely
used byte code cache is probably `APC`_
`byte code caches`_ available, some of which are open source. If you are using
PHP 5.5 or more, the byte code cache is built-in into PHP runtime. For older versions,
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I would write:

If you are using PHP 5.5 or higher, the runtime has a built-in byte code cache.

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As suggested by @ip512 I think it's better to explicitly say "OPcache" instead of talking about an abstract "built-in byte code cache".

the most widely used byte code cache is probably `APC`_

Using a byte code cache really has no downside, and Symfony has been architected
to perform really well in this type of environment.
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