smarty/docs/en/programmers/caching.xml

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  <chapter id="caching">
   <title>Caching</title>
   <para>
   Caching is used to speed up a call to <link
   linkend="api.display"><varname>display()</varname></link> or <link
   linkend="api.fetch"><varname>fetch()</varname></link> by saving its output
   to a file. If a
   cached version of the call is available, that is displayed instead of
   regenerating the output. Caching can speed things up tremendously,
   especially templates with longer computation times. Since the output of
   <link linkend="api.display"><varname>display()</varname></link> or
   <link linkend="api.fetch"><varname>fetch()</varname></link> is cached,
   one cache file could conceivably be made up
   of several template files, config files, etc.
   </para>
   <para>
   Since templates are dynamic, it is important to be careful what you are
   caching and for how long. For instance, if you are displaying the front page
   of your website that does not change its content very often, it might work
   well to cache this page for an hour or more. On the other hand, if you are
   displaying a page with a timetable containing new information by the
   minute, it would not make sense to cache this page.
   </para>
&programmers.caching.caching-setting-up;
&programmers.caching.caching-multiple-caches;
&programmers.caching.caching-groups;

&programmers.caching.caching-cacheable;
</chapter>
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