[TYPO3-core] Cachingframework implementation for lang sysext

Björn Pedersen pedersen at frm2.tum.de
Wed Jun 29 15:56:04 CEST 2011

Am 29.06.2011 15:54, schrieb Björn Pedersen:
> Am 29.06.2011 14:17, schrieb Jigal van Hemert:
>> Hi,
>> On 29-6-2011 12:17, Dominique Feyer wrote:
>>> Dominique Feyer wrote:
>>>> Do you have any idea on how we can improve this feature ?
>>> What do you think about a caching table for the mtime of each file with
>>> a short TTL ?
>> filemtime:
>>     Note: The results of this function are cached. See clearstatcache()
>> for more details.
>> Seems that a cache for this in the database takes more resources than
>> the PHP function...
>> It can however be a clever idea to have multiple caching levels. If we
>> have a small cache in memory which can hold small amounts of data which
>> are needed frequently this could really help reduce the number of
>> database requests.
>> Before deciding to build such a thing statistics about cache hits and
>> misses, size of items, number of requests for same item, etc. are really
>> useful.
>> [1] http://www.php.net/manual/en/function.filemtime.php
> Maybe the whole logic is to complicated:
> When will the ll-files change:
> a) if an extension is installed/updated
> b) if they are modified by hand
> as the cache is a CachingFramework-cache, it will be cleared by 'clear
> all caches', which is in most cases triggered by a).
> In case of b)  you probably should just run the clear cache manually,
> as the ll-files may affect cache FE-Output anyway.
> Björn
 case c) ll-files are modified by a translation extension.
In this case, this extension can easily clear the cache.

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