[TYPO3-core] RFC: #2731: Improved caching of locallang

[Martin Kutschker]

Martin Kutschker schrieb:
> Hello everybody!
> 
> This is a SVN patch request.
> 
> Type: Improvement
> 
> Bugtracker references: http://bugs.typo3.org/view.php?id=2731
> 
> Problem: all preprocessiing of localized strings (incl. the caching) is 
> done in the "native" character set of the language. That means that 
> TYPO3 will (especially for XML files) do a constant conversion from one 
> charset to another (most likely from iso-8859-1 to utf-8). This is a 
> performance hog.
> 
> Solution: hold all localized strings internally (and in the cache files) 
> in the required charset. Do any conversion only once, ie when building 
> up the cache. In the BE the charset is detetmined by the language or 
> forceCharset, in the FE it's also possible to override it further via 
> config.renderCharset. t3lib_div::readLLfile() will auto-detect the 
> charset (from forceCharset and $lang), but has got an optional charset 
> argument (used in the FE for forceCharset).
> 
> Notes: This is a change from the old internal behaviour. Now all the 
> strings are correct at once (after loading from file) without the need 
> for further processing.
> 
> Warning: I have started this patch a long time ago for the BE. This part 
> worked well. The part for the FE I have written right now (in the 
> night). This part is not so well tested.
> 
> As the diff is nearly unreadable please test with various setups. Use 
> languages with different charset, set and unset forceCharset, fiddle 
> with renderCharset. In typo3temp/llxml you'll find a cache file for each 
>  locallang.php, language and charset.

New version of the patch along with the changes in t3lib_div as a whole 
(the readLLfile-family).

Masi
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